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Appliance wattage chart for generators

By the Generator Sizing team · Updated

Typical running and starting watts for all 108 loads in our calculator, from refrigerators to table saws. Every row names its source and shows the lowest and highest figures we found across every source, because the charts disagree.

Typical figures; check your appliance's label. To size a generator, add the running watts of what you run at once, add the largest surge of any one item, and add 20 percent.

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Chart sections

01 How to read it

How to read this wattage chart

Each row gives one typical running figure and one typical starting figure, then the source it came from and the range across all our sources.

  • Typical is the middle of one preferred source's range, rounded up to the nearest 10 W. We prefer a generator maker's own chart, in this order: Champion, Generac, Briggs and Stratton, Westinghouse, Honda, Cummins. For loads none of them lists, we use the first source we found.
  • Starting watts here are the total a motor needs for its first few seconds. Briggs and Stratton lists only the extra watts on top of running, and DTE Energy lists a multiplier; where we turned those into a total, the source row says "computed".
  • Range in our sources is the lowest and highest figure across every source row for that item. Open "All source rows" to see each one.
  • No starting surge means a heating load such as a toaster or a bulb; Briggs and Stratton says only motor-driven items need extra starting watts. No starting figure given means that source did not publish one, as with energy-use tables.

Where the sources disagree most: Champion lists a 3 ton central air unit at 5,000 to 6,000 starting watts, while Generac says one can demand 15,000 to 18,000. For window units, Briggs and Stratton lists a 12,000 BTU model at 3,250 running watts, while Amana rates its 15,000 BTU model at 1,260. Check the nameplate on your own unit.

Starting watts are the reason a generator that covers your running total can still stall. Running vs starting watts explains the math, and what will a generator run works it out size by size.

02 54 items

Home and backup wattage chart

Most outage essentials are small: a refrigerator runs on about 280 watts and an LED bulb on about 20, while central air, an electric water heater (about 3,750 W) and an electric furnace each take thousands.

Home and backup: typical running and starting watts, with the source and the range across our sources
Item and sourceRunning WStarting W
RefrigeratorChampion wattage chart: 150 to 400 W running, 800 to 1,200 W startingRange in our sources: running 132 to 750 W, starting 800 to 2,250 W (8 sources)
All 9 source rows
  • Champion wattage chart, “Refrigerator”: 150 to 400 W running, 800 to 1,200 W starting
  • Honda wattage guide, “Refrigerator or Freezer (Energy Star)”: 132 to 192 W running, 1,200 W starting
  • Honda power management guide, “Refrigerator (power management example)”: 200 W running, 1,600 W starting
  • Briggs and Stratton worksheet, “Refrigerator/Freezer”: 550 W running, plus 1,350 W additional to start (1,900 W total, computed)
  • Westinghouse manual, “Refrigerator or Freezer”: 700 W running, 2,200 W starting
  • Champion flyer, “Refrigerator”: 400 W running, 2,200 W starting
  • DTE Energy worksheet, “Refrigerator/Freezer”: 750 W running, starting factor 3 (2,250 W total, computed)
  • EWEB appliance table, “Refrigerator, top-mount freezer, no icemaker (energy-use table, no surge figure)”: 170 to 220 W running, no starting figure given
  • EWEB appliance table, “Refrigerator, side-mount freezer, with icemaker (energy-use table, no surge figure)”: 210 to 250 W running, no starting figure given
2801,000
Chest freezerChampion wattage chart: 100 to 500 W running, 500 to 1,000 W startingRange in our sources: running 100 to 500 W, starting 500 to 1,000 W (3 sources)
All 3 source rows
  • Champion wattage chart, “Freezer”: 100 to 500 W running, 500 to 1,000 W starting
  • Briggs and Stratton worksheet, “Deep Freezer (from the Briggs worked example)”: 500 W running, plus 500 W additional to start (1,000 W total, computed)
  • EWEB appliance table, “Freezer, compact chest (Energy Star) (energy-use table, no surge figure)”: 160 to 200 W running, no starting figure given
300750
Mini fridgeChampion wattage chart: 50 to 100 W running, 400 to 600 W startingRange in our sources: running 50 to 100 W, starting 400 to 600 W (1 source)80500
Well pump 1/3 hpBriggs and Stratton worksheet: 575 W running, plus 1,440 W additional to startRange in our sources: running 575 to 1,000 W, starting 2,000 to 2,250 W (3 sources)
All 3 source rows
  • Briggs and Stratton worksheet, “Water Well Pump - 1/3 HP”: 575 W running, plus 1,440 W additional to start (2,015 W total, computed)
  • Westinghouse manual, “Well Pump (1/3 hp)”: 1,000 W running, 2,000 W starting
  • DTE Energy worksheet, “Well Pump - 1/3 HP”: 750 W running, starting factor 3 (2,250 W total, computed)
5802,020
Well pump 1/2 hpChampion wattage chart: 750 to 1,000 W running, 1,500 to 2,000 W startingRange in our sources: running 750 to 1,000 W, starting 1,500 to 3,000 W (2 sources)
All 2 source rows
  • Champion wattage chart, “Well pump (1/2 HP)”: 750 to 1,000 W running, 1,500 to 2,000 W starting
  • DTE Energy worksheet, “Well Pump 1/2 HP”: 1,000 W running, starting factor 3 (3,000 W total, computed)
8801,750
Well pump 3/4 hpDTE Energy worksheet: 1,500 W running, 4,500 W startingRange in our sources: running 1,500 W, starting 4,500 W (1 source)1,5004,500
Well pump 1 hpChampion wattage chart: 1,000 to 2,000 W running, 2,000 to 4,000 W startingRange in our sources: running 1,000 to 2,000 W, starting 2,000 to 4,000 W (2 sources)
All 2 source rows
  • Champion wattage chart, “Well pump (1 HP)”: 1,000 to 2,000 W running, 2,000 to 4,000 W starting
  • Oakville Pump (contractor), “1 HP submersible pump on a 25 A breaker (contractor, secondary; says a 1 HP pump needs a 2.5 kW internally regulated generator; 230 V)”: 1,400 W running, no starting figure given
1,5003,000
Sump pump 1/3 hpChampion wattage chart: 500 to 800 W running, 1,000 to 1,600 W startingRange in our sources: running 500 to 1,140 W, starting 1,000 to 3,990 W (4 sources)
All 4 source rows
  • Champion wattage chart, “Sump pump (1/3 HP)”: 500 to 800 W running, 1,000 to 1,600 W starting
  • Honda wattage guide, “Sump Pump 1/3 Horsepower (Honda marks 240V required)”: 800 W running, 1,300 W starting
  • Briggs and Stratton worksheet, “Sump Pump - 1/3 HP”: 1,140 W running, plus 2,850 W additional to start (3,990 W total, computed)
  • Westinghouse manual, “Sump Pump (1/3 hp)”: 800 W running, 1,300 W starting
6501,300
Sump pump 1/2 hpChampion wattage chart: 800 to 1,050 W running, 1,300 to 2,150 W startingRange in our sources: running 800 to 1,200 W, starting 1,300 to 4,200 W (4 sources)
All 4 source rows
  • Champion wattage chart, “Sump pump (1/2 HP)”: 800 to 1,050 W running, 1,300 to 2,150 W starting
  • Honda wattage guide, “Sump Pump 1/2 Horsepower (Honda marks 240V required)”: 1,050 W running, 2,150 W starting
  • Briggs and Stratton worksheet, “Sump Pump - 1/2 HP”: 1,200 W running, plus 3,000 W additional to start (4,200 W total, computed)
  • DTE Energy worksheet, “Submersible Sump Pump - 1/2 HP”: 1,000 W running, starting factor 3 (3,000 W total, computed)
9301,730
Furnace blower 1/4 hpHonda wattage guide: 600 W running, 1,000 W startingRange in our sources: running 400 to 600 W, starting 1,000 to 1,600 W (3 sources)
All 3 source rows
  • Honda wattage guide, “Furnace Fan, gas or fuel oil, 1/4 Horsepower (Honda marks 240V required)”: 600 W running, 1,000 W starting
  • Honda power management guide, “Furnace (1/4 hp fan), power management example”: 600 W running, 1,600 W starting
  • DTE Energy worksheet, “Furnace Fan (Central) - 1/4 HP”: 400 W running, starting factor 3 (1,200 W total, computed)
6001,000
Furnace blower 1/3 hpBriggs and Stratton worksheet: 700 W running, plus 1,400 W additional to startRange in our sources: running 450 to 700 W, starting 1,350 to 2,100 W (3 sources)
All 3 source rows
  • Honda wattage guide, “Furnace Fan 1/3 Horsepower (Honda marks 240V required)”: 700 W running, 1,400 W starting
  • Briggs and Stratton worksheet, “Furnace Fan Blower - 1/3 HP”: 700 W running, plus 1,400 W additional to start (2,100 W total, computed)
  • DTE Energy worksheet, “Furnace Fan (Central) 1/3 HP”: 450 W running, starting factor 3 (1,350 W total, computed)
7002,100
Furnace blower 1/2 hpChampion wattage chart: 300 to 800 W running, 800 to 1,600 W startingRange in our sources: running 300 to 875 W, starting 800 to 3,150 W (5 sources)
All 5 source rows
  • Champion wattage chart, “Furnace fan (1/2 HP)”: 300 to 800 W running, 800 to 1,600 W starting
  • Honda wattage guide, “Furnace Fan 1/2 Horsepower (Honda marks 240V required)”: 875 W running, 2,350 W starting
  • Briggs and Stratton worksheet, “Furnace Fan Blower - 1/2 HP”: 800 W running, plus 2,350 W additional to start (3,150 W total, computed)
  • Westinghouse manual, “Furnace (1/2 hp)”: 800 W running, 2,350 W starting
  • DTE Energy worksheet, “Furnace Fan (Central) 1/2 HP”: 600 W running, starting factor 3 (1,800 W total, computed)
5501,200
Central AC 2 tonChampion wattage chart: 2,000 to 2,500 W running, 3,500 to 4,500 W startingRange in our sources: running 2,000 to 3,800 W, starting 3,500 to 8,750 W (2 sources)
All 2 source rows
  • Champion wattage chart, “Central AC (2 ton)”: 2,000 to 2,500 W running, 3,500 to 4,500 W starting
  • Briggs and Stratton worksheet, “Central AC - 24,000 BTU (24,000 BTU is 2 tons)”: 3,800 W running, plus 4,950 W additional to start (8,750 W total, computed)
2,2504,000
Central AC 3 tonChampion wattage chart: 3,000 to 3,500 W running, 5,000 to 6,000 W startingRange in our sources: running 3,000 to 6,000 W, starting 5,000 to 18,000 W (3 sources)
All 3 source rows
  • Champion wattage chart, “Central AC (3 ton)”: 3,000 to 3,500 W running, 5,000 to 6,000 W starting
  • Generac sizing guide, “3-ton central air conditioner (Generac: starting can be up to 15 kW to 18 kW)”: 3,500 to 5,000 W running, 15,000 to 18,000 W starting
  • DTE Energy worksheet, “Central A/C 3 ton (DTE warns not to run central AC or a heat pump on its 40 A GenerLink)”: 6,000 W running, starting factor 3 (18,000 W total, computed)
3,2505,500
Central AC 40,000 BTU (about 3.3 ton)Briggs and Stratton worksheet: 6,000 W running, plus 6,700 W additional to startRange in our sources: running 6,000 W, starting 12,700 W (1 source)6,00012,700
Central AC 4 tonChampion wattage chart: 4,000 to 5,000 W running, 6,500 to 8,000 W startingRange in our sources: running 4,000 to 5,000 W, starting 6,500 to 8,000 W (1 source)4,5007,250
Central AC 5 tonDuroMax: 6,000 W running, no starting surge listedRange in our sources: running 6,000 W, no starting figure (1 source)6,0006,000
Central AC (size not given)The Home Depot: 2,000 to 4,000 W running, no starting surge listedRange in our sources: running 2,000 to 4,000 W, no starting figure (1 source)3,0003,000
Heat pumpBriggs and Stratton worksheet: 4,700 W running, plus 4,500 W additional to startRange in our sources: running 4,700 to 6,000 W, starting 9,200 to 18,000 W (2 sources)
All 2 source rows
  • Briggs and Stratton worksheet, “Heat Pump”: 4,700 W running, plus 4,500 W additional to start (9,200 W total, computed)
  • DTE Energy worksheet, “Electric Heat Pump”: 6,000 W running, starting factor 3 (18,000 W total, computed)
4,7009,200
Window AC 5,000 BTUChampion wattage chart: 450 to 600 W running, 900 to 1,200 W startingRange in our sources: running 450 to 600 W, starting 900 to 1,200 W (1 source)5301,050
Window AC 10,000 BTUChampion wattage chart: 900 to 1,200 W running, 1,800 to 2,400 W startingRange in our sources: running 900 to 1,500 W, starting 1,800 to 3,100 W (3 sources)
All 3 source rows
  • Champion wattage chart, “Window AC (10,000 BTU)”: 900 to 1,200 W running, 1,800 to 2,400 W starting
  • Honda wattage guide, “Window Air Conditioner (10,000 BTU)”: 1,500 W running, 2,200 W starting
  • Briggs and Stratton worksheet, “Window AC - 10,000 BTU”: 1,000 W running, plus 2,100 W additional to start (3,100 W total, computed)
1,0502,100
Window AC 12,000 BTUGenerac worksheet: 3,250 W running, no starting surge listedRange in our sources: running 3,250 W, starting 7,200 W (2 sources)
All 2 source rows
  • Briggs and Stratton worksheet, “Window AC - 12,000 BTU (high vs other sources; the Generac worksheet also lists 3,250 running)”: 3,250 W running, plus 3,950 W additional to start (7,200 W total, computed)
  • Generac worksheet, “Window AC (12,000 BTU) (starting column not legible in the PDF text)”: 3,250 W running, no starting figure given
3,2503,250
Window AC 15,000 BTUAmana spec listing: 1,260 W running, no starting surge listedRange in our sources: running 1,260 W, no starting figure (1 source)1,2601,260
Window AC (size not given)Champion flyer: 1,200 W running, 2,000 W startingRange in our sources: running 600 to 1,500 W, starting 2,000 W (3 sources)
All 3 source rows
  • Champion flyer, “Air Conditioner (window unit)”: 1,200 W running, 2,000 W starting
  • The Home Depot, “Window Air Conditioner”: 600 to 1,500 W running, no starting figure given
  • EWEB appliance table, “Air conditioner - Room”: 1,000 to 1,400 W running, no starting figure given
1,2002,000
Space heaterChampion wattage chart: 750 to 1,500 W running, no starting surge listedRange in our sources: running 500 to 1,500 W, no starting figure (4 sources)
All 4 source rows
  • Champion wattage chart, “Space heater”: 750 to 1,500 W running, no starting figure given
  • Briggs and Stratton worksheet, “Space Heater”: 1,500 W running, no starting surge
  • EWEB appliance table, “Space heater”: 1,000 to 1,500 W running, no starting figure given
  • DTE Energy worksheet, “Space Heater”: 500 to 1,500 W running, no starting surge
1,1301,130
Electric water heater (tank)Champion wattage chart: 3,000 to 4,500 W running, no starting surge listedRange in our sources: running 3,000 to 5,500 W, starting 4,500 W (5 sources)
All 5 source rows
  • Champion wattage chart, “Electric water heater”: 3,000 to 4,500 W running, no starting figure given
  • Honda wattage guide, “Hot Water Heater (Honda marks 240V required)”: 4,500 W running, 4,500 W starting
  • Briggs and Stratton worksheet, “Electric Water Heater”: 3,800 W running, no starting surge
  • DTE Energy worksheet, “Water Heater (50 gallon)”: 4,500 to 5,000 W running, no starting surge
  • EWEB appliance table, “Water heater, 50-gallon standard-efficiency”: 4,500 to 5,500 W running, no starting figure given
3,7503,750
Tankless electric water heaterStiebel Eltron spec: 12,000 W running, no starting surge listedRange in our sources: running 12,000 to 36,000 W, no starting figure (1 source)
All 3 source rows
  • Stiebel Eltron spec, “Stiebel Eltron Tempra 12 / 12 Plus (240 V) (50 A draw)”: 12,000 W running, no starting figure given
  • Stiebel Eltron spec, “Stiebel Eltron Tempra 24 / 24 Plus (240 V) (2 x 50 A draw)”: 24,000 W running, no starting figure given
  • Stiebel Eltron spec, “Stiebel Eltron Tempra 36 / 36 Plus (240 V) (3 x 50 A draw)”: 36,000 W running, no starting figure given
12,00012,000
Electric furnaceThe Home Depot: 5,000 to 25,000 W running, no starting surge listedRange in our sources: running 5,000 to 25,000 W, no starting figure (1 source)15,00015,000
DehumidifierEWEB appliance table: 350 to 720 W running, no starting surge listedRange in our sources: running 350 to 840 W, starting 1,680 W (2 sources)
All 2 source rows
  • EWEB appliance table, “Dehumidifier (30-70 pint capacity)”: 350 to 720 W running, no starting figure given
  • DTE Energy worksheet, “Dehumidifier”: 840 W running, starting factor 2 (1,680 W total, computed)
540540
Ceiling fanChampion wattage chart: 15 to 75 W running, no starting surge listedRange in our sources: running 15 to 175 W, no starting figure (2 sources)
All 2 source rows
  • Champion wattage chart, “Ceiling fan”: 15 to 75 W running, no starting figure given
  • EWEB appliance table, “Fan - Ceiling-mounted”: 65 to 175 W running, no starting figure given
5050
Box fanChampion wattage chart: 50 to 200 W running, no starting surge listedRange in our sources: running 50 to 200 W, no starting figure (2 sources)
All 2 source rows
  • Champion wattage chart, “Box fan”: 50 to 200 W running, no starting figure given
  • Briggs and Stratton worksheet, “Box Fan - 20 in”: 100 W running, no starting surge
130130
Home security systemChampion wattage chart: 15 to 40 W running, no starting surge listedRange in our sources: running 15 to 500 W, no starting figure (3 sources)
All 3 source rows
  • Champion wattage chart, “Home security system”: 15 to 40 W running, no starting figure given
  • Briggs and Stratton worksheet, “Security System”: 500 W running, no starting surge
  • DTE Energy worksheet, “Home Security System”: 200 W running, no starting surge
3030
Garage door openerBriggs and Stratton worksheet: 550 W running, plus 1,375 W additional to startRange in our sources: running 550 to 1,050 W, starting 1,420 to 3,150 W (3 sources)
All 4 source rows
  • Honda wattage guide, “Garage Door Opener”: 720 W running, 1,420 W starting
  • Briggs and Stratton worksheet, “1/2 HP Garage Door Opener”: 550 W running, plus 1,375 W additional to start (1,925 W total, computed)
  • DTE Energy worksheet, “Garage Door Opener - 1/3 HP”: 750 W running, starting factor 3 (2,250 W total, computed)
  • DTE Energy worksheet, “Garage Door Opener - 1/2 HP”: 1,050 W running, starting factor 3 (3,150 W total, computed)
5501,930
Hot tubEWEB appliance table: 4,700 to 5,800 W running, no starting surge listedRange in our sources: running 3,200 to 5,800 W, no starting figure (1 source)
All 2 source rows
  • EWEB appliance table, “Hot tub (pump and electric heater), typical (no surge figure)”: 4,700 to 5,800 W running, no starting figure given
  • EWEB appliance table, “Hot tub (pump and heater), meeting California efficiency code”: 3,200 to 4,500 W running, no starting figure given
5,2505,250
Pool pumpEWEB appliance table: 373 W running, no starting surge listedRange in our sources: running 373 W, no starting figure (1 source)380380
EV charger Level 1U.S. DOE AFDC: 1,900 W running, no starting surge listedRange in our sources: running 1,900 W, no starting figure (1 source)1,9001,900
EV charger Level 2U.S. DOE AFDC: 7,200 W running, no starting surge listedRange in our sources: running 2,900 to 19,200 W, no starting figure (1 source)
All 2 source rows
  • U.S. DOE AFDC, “Level 2, typical residential (up to 30 A, 240 V) (AFDC: Level 2 units range 2.9 to 19.2 kW)”: 7,200 W running, no starting figure given
  • U.S. DOE AFDC, “Level 2, full range”: 2,900 to 19,200 W running, no starting figure given
7,2007,200
CPAP (no heated humidifier)Champion wattage chart: 30 to 60 W running, no starting surge listedRange in our sources: running 30 to 60 W, no starting figure (1 source)5050
CPAP (heated humidifier)Champion wattage chart: 60 to 120 W running, no starting surge listedRange in our sources: running 60 to 120 W, no starting figure (1 source)9090
Oxygen concentratorPhilips Respironics: 350 W running, no starting surge listedRange in our sources: running 350 W, no starting figure (1 source)350350
Internet router/modemChampion wattage chart: 10 to 20 W running, no starting surge listedRange in our sources: running 6 to 20 W, no starting figure (2 sources)
All 3 source rows
  • Champion wattage chart, “Internet router/modem”: 10 to 20 W running, no starting figure given
  • EWEB appliance table, “Wireless Internet Router, always on”: 6 to 7 W running, no starting figure given
  • EWEB appliance table, “Modem, cable or DSL, always on”: 6 W running, no starting figure given
2020
Phone chargerChampion wattage chart: 20 to 100 W running, no starting surge listedRange in our sources: running 4 to 100 W, no starting figure (3 sources)
All 3 source rows
  • Champion wattage chart, “Phone/laptop charger”: 20 to 100 W running, no starting figure given
  • Briggs and Stratton worksheet, “Cell Phone Battery Charger”: 25 W running, no starting surge
  • EWEB appliance table, “Telephone, Mobile Charger (on, charging)”: 4 W running, no starting figure given
6060
TVChampion wattage chart: 80 to 400 W running, no starting surge listedRange in our sources: running 75 to 400 W, starting 120 to 190 W (4 sources)
All 5 source rows
  • Champion wattage chart, “TV (32-55 in)”: 80 to 400 W running, no starting figure given
  • Honda wattage guide, “Television, Flat Screen (20 in)”: 120 W running, 120 W starting
  • Honda wattage guide, “Television, Flat Screen (46 in)”: 190 W running, 190 W starting
  • Briggs and Stratton worksheet, “LCD TV - 32 in”: 75 W running, no starting surge
  • EWEB appliance table, “Television, LCD or LED 45-inch”: 110 to 213 W running, no starting figure given
240240
Desktop computerBriggs and Stratton worksheet: 300 W running, no starting surge listedRange in our sources: running 40 to 800 W, starting 600 to 800 W (3 sources)
All 3 source rows
  • Honda wattage guide, “Computer, Desktop”: 600 to 800 W running, 600 to 800 W starting
  • Briggs and Stratton worksheet, “Desktop Computer w/ 18 in LCD Monitor”: 300 W running, no starting surge
  • EWEB appliance table, “Computer, desktop”: 40 to 120 W running, no starting figure given
300300
LaptopHonda wattage guide: 200 to 250 W running, 200 to 250 W startingRange in our sources: running 12 to 250 W, starting 200 to 250 W (3 sources)
All 3 source rows
  • Honda wattage guide, “Computer, Laptop”: 200 to 250 W running, 200 to 250 W starting
  • EWEB appliance table, “Computer, laptop”: 12 to 50 W running, no starting figure given
  • Cummins RV guide, “Laptop”: 20 to 50 W running, no starting figure given
230230
LED bulbChampion wattage chart: 8 to 15 W running, no starting surge listedRange in our sources: running 8 to 15 W, no starting figure (2 sources)
All 2 source rows
  • Champion wattage chart, “LED lights (per bulb)”: 8 to 15 W running, no starting figure given
  • EWEB appliance table, “LED, 60 Watt equivalent”: 9 W running, no starting figure given
2020
Incandescent bulbBriggs and Stratton worksheet: 60 W running, no starting surge listedRange in our sources: running 60 to 75 W, starting 60 W (2 sources)
All 3 source rows
  • Briggs and Stratton worksheet, “Light Bulb - 60 Watt”: 60 W running, no starting surge
  • Briggs and Stratton worksheet, “Light Bulb - 75 Watt”: 75 W running, no starting surge
  • Honda wattage guide, “Incandescent Lights (as indicated on bulb, e.g. 60W)”: 60 W running, 60 W starting
6060
Christmas lights (incandescent string)Briggs and Stratton worksheet: 250 W running, no starting surge listedRange in our sources: running 125 to 250 W, no starting figure (2 sources)
All 2 source rows
  • Yukon tip sheet, “String of 25 screw-socket bulbs at 5 or 7 W each”: 125 to 175 W running, no starting figure given
  • Briggs and Stratton worksheet, “Outdoor Light String”: 250 W running, no starting surge
250250
Christmas lights (LED string)Yukon tip sheet: 2 W running, no starting surge listedRange in our sources: running 2 W, no starting figure (1 source)1010
Hair dryerBriggs and Stratton worksheet: 1,250 W running, no starting surge listedRange in our sources: running 1,200 to 1,875 W, starting 1,900 W (3 sources)
All 3 source rows
  • Honda wattage guide, “Hair Dryer (1600 watts)”: 1,800 W running, 1,900 W starting
  • Briggs and Stratton worksheet, “Hair Dryer - 1250 Watt”: 1,250 W running, no starting surge
  • Cummins RV guide, “Hair dryer”: 1,200 to 1,875 W running, no starting figure given
1,2501,250
IronBriggs and Stratton worksheet: 1,200 W running, no starting surge listedRange in our sources: running 1,200 W, no starting figure (1 source)1,2001,200
Vacuum (household)Cummins RV guide: 1,000 to 1,440 W running, no starting surge listedRange in our sources: running 650 to 1,600 W, no starting figure (2 sources)
All 2 source rows
  • EWEB appliance table, “Vacuum cleaner (central or portable)”: 650 to 1,600 W running, no starting figure given
  • Cummins RV guide, “Broom / Vacuum”: 1,000 to 1,440 W running, no starting figure given
1,2201,220
HumidifierBriggs and Stratton worksheet: 175 W running, no starting surge listedRange in our sources: running 175 W, no starting figure (1 source)180180
Electric blanketEWEB appliance table: 100 W running, no starting surge listedRange in our sources: running 100 W, no starting figure (1 source)100100

03 18 items

Kitchen and laundry wattage chart

The heat makers draw the most: a microwave about 900 watts, one electric range burner about 1,800, and an electric dryer about 5,000 (Champion).

Kitchen and laundry: typical running and starting watts, with the source and the range across our sources
Item and sourceRunning WStarting W
MicrowaveChampion wattage chart: 600 to 1,200 W running, no starting surge listedRange in our sources: running 600 to 1,500 W, starting 1,000 to 2,000 W (5 sources)
All 6 source rows
  • Champion wattage chart, “Microwave”: 600 to 1,200 W running, no starting figure given
  • Honda wattage guide, “Microwave Oven, 650 watts”: 1,000 W running, 1,000 W starting
  • Honda wattage guide, “Microwave Oven, 1000 watts”: 1,500 W running, 1,500 W starting
  • Briggs and Stratton worksheet, “Microwave Oven - 1000 Watts”: 1,000 W running, no starting surge
  • Champion flyer, “Microwave”: 800 W running, 2,000 W starting
  • Cummins RV guide, “Microwave”: 750 to 1,500 W running, no starting figure given
900900
Electric range (one burner)Champion wattage chart: 1,200 to 2,400 W running, no starting surge listedRange in our sources: running 1,200 to 2,400 W, starting 2,100 W (4 sources)
All 5 source rows
  • Champion wattage chart, “Electric range (one burner)”: 1,200 to 2,400 W running, no starting figure given
  • Honda wattage guide, “Electric Range (8-inch element) (Honda marks 240V required)”: 2,100 W running, 2,100 W starting
  • Briggs and Stratton worksheet, “Electric Stove - 8 in Element”: 2,100 W running, no starting surge
  • DTE Energy worksheet, “Range - Small Burner”: 1,300 W running, no starting surge
  • DTE Energy worksheet, “Range - Large Burner”: 2,400 W running, no starting surge
1,8001,800
Electric range with oven (whole unit)DTE Energy worksheet: 12,200 W running, no starting surge listedRange in our sources: running 12,200 W, no starting figure (1 source)12,20012,200
Electric ovenThe Home Depot: 5,000 W running, no starting surge listedRange in our sources: running 5,000 to 7,200 W, no starting figure (2 sources)
All 2 source rows
  • The Home Depot, “Electric Oven”: 5,000 W running, no starting figure given
  • EWEB appliance table, “Oven - Self-cleaning”: 5,000 to 7,200 W running, no starting figure given
5,0005,000
DishwasherChampion wattage chart: 1,200 to 2,400 W running, no starting surge listedRange in our sources: running 216 to 2,400 W, starting 540 to 4,200 W (6 sources)
All 6 source rows
  • Champion wattage chart, “Dishwasher”: 1,200 to 2,400 W running, no starting figure given
  • Honda wattage guide, “Dishwasher (Cool Dry)”: 216 W running, 540 W starting
  • Briggs and Stratton worksheet, “Dishwasher - Hot Dry”: 1,200 W running, plus 3,000 W additional to start (4,200 W total, computed)
  • Champion flyer, “Dishwasher”: 1,200 W running, 1,500 W starting
  • DTE Energy worksheet, “Dishwasher w/o hot water”: 1,200 W running, starting factor 2 (2,400 W total, computed)
  • EWEB appliance table, “Dishwasher (Energy Star)”: 633 W running, no starting figure given
1,8001,800
Washing machineChampion wattage chart: 500 to 1,000 W running, 1,000 to 2,300 W startingRange in our sources: running 500 to 1,200 W, starting 1,000 to 3,350 W (5 sources)
All 5 source rows
  • Champion wattage chart, “Washing machine”: 500 to 1,000 W running, 1,000 to 2,300 W starting
  • Honda wattage guide, “Automatic Washer”: 1,200 W running, 1,200 W starting
  • Briggs and Stratton worksheet, “Washing Machine”: 950 W running, plus 2,400 W additional to start (3,350 W total, computed)
  • Champion flyer, “Washing Machine”: 500 W running, 1,200 W starting
  • DTE Energy worksheet, “Washing Machine w/o Hot Water”: 1,000 W running, starting factor 2 (2,000 W total, computed)
7501,650
Electric dryerChampion wattage chart: 4,000 to 6,000 W running, no starting surge listedRange in our sources: running 1,000 to 6,000 W, starting 3,000 to 12,600 W (6 sources)
All 6 source rows
  • Champion wattage chart, “Electric dryer”: 4,000 to 6,000 W running, no starting figure given
  • Honda wattage guide, “Clothes Dryer (Electric) (Honda marks 240V required)”: 5,400 W running, 6,750 W starting
  • Briggs and Stratton worksheet, “Clothes Dryer - Electric”: 3,600 W running, plus 9,000 W additional to start (12,600 W total, computed)
  • EWEB appliance table, “Clothes dryer, standard”: 3,400 to 5,000 W running, no starting figure given
  • DTE Energy worksheet, “Clothes Dryer”: 4,850 W running, starting factor 2 (9,700 W total, computed)
  • Champion flyer, “Electric Dryer (the Champion flyer figure is far below every other source)”: 1,000 W running, 3,000 W starting
5,0005,000
Gas dryerBriggs and Stratton worksheet: 1,800 W running, plus 4,500 W additional to startRange in our sources: running 1,800 W, starting 6,300 W (1 source)1,8006,300
Coffee makerChampion flyer: 800 W running, no starting surge listedRange in our sources: running 600 to 1,500 W, starting 600 W (5 sources)
All 5 source rows
  • Honda wattage guide, “Coffee Maker (4 cup)”: 600 W running, 600 W starting
  • Briggs and Stratton worksheet, “Coffee Maker”: 1,300 W running, no starting surge
  • Champion flyer, “Coffee Maker”: 800 W running, no starting figure given
  • EWEB appliance table, “Coffee maker”: 1,100 to 1,500 W running, no starting figure given
  • DTE Energy worksheet, “Coffee maker”: 750 to 1,200 W running, no starting surge
800800
ToasterChampion flyer: 900 W running, no starting surge listedRange in our sources: running 850 to 1,700 W, no starting figure (4 sources)
All 4 source rows
  • Champion flyer, “Toaster”: 900 W running, no starting figure given
  • Briggs and Stratton worksheet, “Toaster”: 850 W running, no starting surge
  • DTE Energy worksheet, “Toaster”: 1,100 W running, no starting surge
  • The Home Depot, “Toaster”: 1,100 to 1,700 W running, no starting figure given
900900
Toaster ovenBriggs and Stratton worksheet: 1,500 W running, no starting surge listedRange in our sources: running 1,200 to 1,500 W, no starting figure (2 sources)
All 2 source rows
  • Briggs and Stratton worksheet, “Toaster Oven”: 1,500 W running, no starting surge
  • EWEB appliance table, “Oven - Toaster”: 1,200 W running, no starting figure given
1,5001,500
Slow cookerBriggs and Stratton worksheet: 240 W running, no starting surge listedRange in our sources: running 170 to 270 W, starting 170 to 270 W (2 sources)
All 2 source rows
  • Honda wattage guide, “Slow Cooker”: 170 to 270 W running, 170 to 270 W starting
  • Briggs and Stratton worksheet, “Crock Pot”: 240 W running, no starting surge
240240
Air fryerChampion flyer: 1,500 W running, no starting surge listedRange in our sources: running 1,500 W, no starting figure (1 source)1,5001,500
BlenderChampion flyer: 500 W running, 700 W startingRange in our sources: running 400 to 700 W, starting 700 to 850 W (3 sources)
All 3 source rows
  • Honda wattage guide, “Blender”: 400 W running, 850 W starting
  • Champion flyer, “Blender”: 500 W running, 700 W starting
  • Cummins RV guide, “Blender”: 450 to 700 W running, no starting figure given
500700
Food processorBriggs and Stratton worksheet: 500 W running, no starting surge listedRange in our sources: running 500 W, no starting figure (1 source)500500
Electric skillet / fry panChampion flyer: 1,000 W running, 2,000 W startingRange in our sources: running 1,000 to 1,500 W, starting 1,500 to 2,000 W (2 sources)
All 2 source rows
  • Honda wattage guide, “Electric Fry Pan”: 1,500 W running, 1,500 W starting
  • Champion flyer, “Electric Skillet”: 1,000 W running, 2,000 W starting
1,0002,000
Portable induction cooktopChampion wattage chart: 1,200 to 1,800 W running, no starting surge listedRange in our sources: running 1,200 to 1,800 W, no starting figure (1 source)1,5001,500
Electric grillChampion wattage chart: 1,650 W running, no starting surge listedRange in our sources: running 1,500 to 1,650 W, starting 1,650 to 3,000 W (3 sources)
All 3 source rows
  • Champion wattage chart, “Electric grill”: 1,650 W running, no starting figure given
  • Honda wattage guide, “Electric Grill (tabletop)”: 1,650 W running, 1,650 W starting
  • Champion flyer, “Electric Grill”: 1,500 W running, 3,000 W starting
1,6501,650

04 8 items

RV and camping wattage chart

The rooftop air conditioner is the big one: a 13,500 BTU RV unit runs on about 1,750 watts and needs about 3,150 to start (Champion).

RV and camping: typical running and starting watts, with the source and the range across our sources
Item and sourceRunning WStarting W
RV AC 11,000 BTUWestinghouse manual: 1,010 W running, 1,600 W startingRange in our sources: running 1,010 W, starting 1,600 W (2 sources)
All 2 source rows
  • Honda wattage guide, “RV Air Conditioner 11000 BTU”: 1,010 W running, 1,600 W starting
  • Westinghouse manual, “RV Air Conditioner (11,000 BTU)”: 1,010 W running, 1,600 W starting
1,0101,600
RV AC 13,500 BTUChampion wattage chart: 1,500 to 2,000 W running, 2,800 to 3,500 W startingRange in our sources: running 1,500 to 2,000 W, starting 2,800 to 3,500 W (3 sources)
All 3 source rows
  • Champion wattage chart, “RV air conditioner (13,500 BTU)”: 1,500 to 2,000 W running, 2,800 to 3,500 W starting
  • Honda wattage guide, “RV Air Conditioner 13500 BTU”: 1,800 W running, 2,800 W starting
  • Cummins sizing guide, “Roof-mounted 13,500 BTU A/C (worked example)”: 1,800 W running, 2,800 W starting
1,7503,150
RV AC 15,000 BTUChampion wattage chart: 2,000 to 2,500 W running, 3,500 to 4,500 W startingRange in our sources: running 2,000 to 2,500 W, starting 3,300 to 4,500 W (2 sources)
All 2 source rows
  • Champion wattage chart, “RV air conditioner (15,000 BTU)”: 2,000 to 2,500 W running, 3,500 to 4,500 W starting
  • Honda wattage guide, “RV Air Conditioner 15000 BTU”: 2,000 W running, 3,300 W starting
2,2504,000
RV refrigeratorChampion wattage chart: 150 to 600 W running, 400 to 1,000 W startingRange in our sources: running 150 to 600 W, starting 400 to 1,000 W (3 sources)
All 3 source rows
  • Champion wattage chart, “RV refrigerator”: 150 to 600 W running, 400 to 1,000 W starting
  • Honda wattage guide, “RV Refrigerator”: 180 W running, 600 W starting
  • Westinghouse manual, “RV Refrigerator”: 180 W running, 600 W starting
380700
RV converterCummins RV guide: 500 to 1,000 W running, no starting surge listedRange in our sources: running 500 to 1,000 W, no starting figure (1 source)750750
RV microwaveChampion wattage chart: 600 to 1,200 W running, no starting surge listedRange in our sources: running 600 to 1,200 W, no starting figure (1 source)900900
RV water heater (electric element)Champion wattage chart: 1,200 to 1,500 W running, no starting surge listedRange in our sources: running 1,200 to 1,500 W, no starting figure (1 source)1,3501,350
Satellite receiverHonda wattage guide: 250 W running, 250 W startingRange in our sources: running 250 W, starting 250 W (1 source)250250

05 28 items

Job site and shop wattage chart

Saws and compressors surge the hardest: a 1 hp air compressor runs on about 1,500 watts but needs about 4,500 to start (Champion).

Job site and shop: typical running and starting watts, with the source and the range across our sources
Item and sourceRunning WStarting W
Circular saw 7-1/4 inChampion wattage chart: 1,200 to 1,800 W running, 2,400 to 3,600 W startingRange in our sources: running 1,200 to 2,100 W, starting 2,000 to 7,350 W (5 sources)
All 5 source rows
  • Champion wattage chart, “Circular saw (7-1/4 in)”: 1,200 to 1,800 W running, 2,400 to 3,600 W starting
  • Honda wattage guide, “Circular Saw (Heavy Duty, 7 1/4 in.)”: 1,400 W running, 2,300 W starting
  • Briggs and Stratton worksheet, “Circular Saw - 7-1/4 in”: 2,100 W running, plus 5,250 W additional to start (7,350 W total, computed)
  • Westinghouse manual, “Circular Saw (Heavy Duty, 7-1/4 in)”: 1,400 W running, 2,300 W starting
  • Champion flyer, “Circular Saw”: 1,500 W running, 2,000 W starting
1,5003,000
Miter saw 10 inChampion wattage chart: 1,200 to 1,800 W running, 2,400 to 3,600 W startingRange in our sources: running 1,200 to 1,800 W, starting 1,800 to 6,300 W (3 sources)
All 3 source rows
  • Champion wattage chart, “Miter saw (10 in)”: 1,200 to 1,800 W running, 2,400 to 3,600 W starting
  • Briggs and Stratton worksheet, “Miter Saw - 10 in”: 1,800 W running, plus 4,500 W additional to start (6,300 W total, computed)
  • Westinghouse manual, “Miter Saw (10 in)”: 1,800 W running, 1,800 W starting
1,5003,000
Table saw 10 inChampion wattage chart: 1,800 to 3,000 W running, 3,600 to 6,000 W startingRange in our sources: running 1,800 to 3,000 W, starting 2,000 to 6,300 W (5 sources)
All 5 source rows
  • Champion wattage chart, “Table saw (10 in)”: 1,800 to 3,000 W running, 3,600 to 6,000 W starting
  • Honda wattage guide, “Table Saw (10 in.)”: 1,800 W running, 4,500 W starting
  • Briggs and Stratton worksheet, “Table Saw/Radial Arm Saw - 10 in”: 1,800 W running, plus 4,500 W additional to start (6,300 W total, computed)
  • Westinghouse manual, “Table Saw (10 in)”: 2,000 W running, 2,000 W starting
  • Champion flyer, “Table Saw”: 1,800 W running, 2,500 W starting
2,4004,800
Air compressor 1/3 hpBriggs and Stratton worksheet: 300 W running, plus 780 W additional to startRange in our sources: running 300 W, starting 1,080 W (1 source)3001,080
Air compressor 1/2 hpHonda wattage guide: 975 W running, 1,600 W startingRange in our sources: running 975 W, starting 1,600 W (1 source)9801,600
Air compressor 1 hpChampion wattage chart: 1,500 W running, 4,500 W startingRange in our sources: running 900 to 1,800 W, starting 4,500 to 5,000 W (4 sources)
All 4 source rows
  • Champion wattage chart, “Air compressor (1 HP)”: 1,500 W running, 4,500 W starting
  • Honda wattage guide, “Air Compressor 1 hp”: 1,600 W running, 4,500 W starting
  • Briggs and Stratton worksheet, “Air Compressor - 1 HP”: 1,400 W running, plus 3,600 W additional to start (5,000 W total, computed)
  • Cummins RV guide, “Air compressor (1 HP)”: 900 to 1,800 W running, no starting figure given
1,5004,500
Air compressor 2 hpChampion wattage chart: 2,500 W running, 7,500 W startingRange in our sources: running 2,500 W, starting 7,500 W (1 source)2,5007,500
Air compressor 3 hpChampion wattage chart: 3,500 W running, 10,500 W startingRange in our sources: running 3,500 W, starting 10,500 W (1 source)3,50010,500
Drill 3/8 inBriggs and Stratton worksheet: 480 W running, plus 1,200 W additional to startRange in our sources: running 440 to 480 W, starting 600 to 1,680 W (3 sources)
All 3 source rows
  • Honda wattage guide, “Drills 3/8 inch, 4 amps”: 440 W running, 600 W starting
  • Briggs and Stratton worksheet, “Electric Drill - 3/8 in, 4 Amps”: 480 W running, plus 1,200 W additional to start (1,680 W total, computed)
  • Westinghouse manual, “Drill (3/8 in, 4 amps)”: 440 W running, 600 W starting
4801,680
Drill 1/2 inChampion wattage chart: 400 to 600 W running, 800 to 1,200 W startingRange in our sources: running 400 to 1,100 W, starting 800 to 2,350 W (3 sources)
All 3 source rows
  • Champion wattage chart, “Electric drill (1/2 in)”: 400 to 600 W running, 800 to 1,200 W starting
  • Honda wattage guide, “Drills 1/2 inch, 5.4 amps”: 600 W running, 900 W starting
  • Briggs and Stratton worksheet, “Electric Drill - 1/2 in, 5.4 Amps”: 1,100 W running, plus 1,250 W additional to start (2,350 W total, computed)
5001,000
Hammer drillChampion wattage chart: 900 to 1,200 W running, 1,800 to 2,400 W startingRange in our sources: running 900 to 1,600 W, starting 1,800 to 3,000 W (3 sources)
All 3 source rows
  • Champion wattage chart, “Hammer drill”: 900 to 1,200 W running, 1,800 to 2,400 W starting
  • Briggs and Stratton worksheet, “Hammer Drill”: 1,600 W running, plus 1,400 W additional to start (3,000 W total, computed)
  • Champion flyer, “Hammer Drill”: 1,000 W running, 3,000 W starting
1,0502,100
Angle grinder 4-1/2 inChampion wattage chart: 900 to 1,800 W running, 1,800 to 3,600 W startingRange in our sources: running 800 to 1,800 W, starting 1,800 to 3,600 W (2 sources)
All 2 source rows
  • Champion wattage chart, “Angle grinder (4-1/2 in)”: 900 to 1,800 W running, 1,800 to 3,600 W starting
  • Champion flyer, “Angle Grinder”: 800 W running, 2,400 W starting
1,3502,700
Bench grinder 8 inHonda wattage guide: 1,400 W running, 2,500 W startingRange in our sources: running 1,400 W, starting 2,500 W (1 source)1,4002,500
Reciprocating sawChampion wattage chart: 960 to 1,200 W running, 1,920 to 2,400 W startingRange in our sources: running 960 to 1,200 W, starting 1,920 to 3,780 W (2 sources)
All 2 source rows
  • Champion wattage chart, “Reciprocating saw”: 960 to 1,200 W running, 1,920 to 2,400 W starting
  • Briggs and Stratton worksheet, “Reciprocating Saw”: 1,080 W running, plus 2,700 W additional to start (3,780 W total, computed)
1,0802,160
Belt sanderChampion wattage chart: 800 to 1,200 W running, 1,600 to 2,400 W startingRange in our sources: running 800 to 1,200 W, starting 1,600 to 3,350 W (2 sources)
All 2 source rows
  • Champion wattage chart, “Belt sander”: 800 to 1,200 W running, 1,600 to 2,400 W starting
  • Briggs and Stratton worksheet, “Belt Sander”: 950 W running, plus 2,400 W additional to start (3,350 W total, computed)
1,0002,000
Pressure washer (electric) 1,500 psiChampion wattage chart: 1,200 to 1,500 W running, 2,400 to 3,000 W startingRange in our sources: running 1,200 to 1,500 W, starting 2,400 to 3,000 W (1 source)1,3502,700
Pressure washer (electric) 2,500 psiChampion wattage chart: 2,000 to 2,500 W running, 4,000 to 5,000 W startingRange in our sources: running 2,000 to 2,500 W, starting 4,000 to 5,000 W (1 source)2,2504,500
Pressure washer (electric) 1 hpHonda wattage guide: 1,200 W running, 3,600 W startingRange in our sources: running 1,200 W, starting 3,600 W (1 source)1,2003,600
Shop vac (wet/dry)RIDGID spec: 1,440 W running, no starting surge listedRange in our sources: running 1,440 W, no starting figure (1 source)1,4401,440
Welder 120 VChampion wattage chart: 1,800 to 2,500 W running, 3,600 to 5,000 W startingRange in our sources: running 1,800 to 2,500 W, starting 3,600 to 5,000 W (1 source)2,1504,300
Welder 240 VChampion wattage chart: 3,000 to 8,000 W running, 6,000 to 16,000 W startingRange in our sources: running 3,000 to 8,000 W, starting 6,000 to 16,000 W (1 source)5,50011,000
Electric chainsawHonda wattage guide: 1,100 W running, 1,100 W startingRange in our sources: running 1,100 W, starting 1,100 W (1 source)1,1001,100
Work light, halogen 500 WChampion wattage chart: 500 W running, no starting surge listedRange in our sources: running 500 W, no starting figure (2 sources)
All 2 source rows
  • Champion wattage chart, “Work lights (halogen, 500W)”: 500 W running, no starting figure given
  • Briggs and Stratton worksheet, “Quartz Halogen Work Light, 500”: 500 W running, no starting surge
500500
Work light, LEDChampion wattage chart: 15 to 25 W running, no starting surge listedRange in our sources: running 15 to 25 W, no starting figure (1 source)2020
Battery charger (heavy duty)Champion wattage chart: 1,500 to 2,000 W running, no starting surge listedRange in our sources: running 1,500 to 2,000 W, no starting figure (1 source)1,7501,750
Motor, capacitor start induction run, 1/2 hpHonda wattage guide: 600 W running, 1,800 W startingRange in our sources: running 600 W, starting 1,800 W (1 source)6001,800
Motor, capacitor start induction run, 1 hpHonda wattage guide: 1,000 W running, 3,000 W startingRange in our sources: running 1,000 W, starting 3,000 W (1 source)1,0003,000
Motor, capacitor start induction run, 2 hpHonda wattage guide: 2,000 W running, 5,100 W startingRange in our sources: running 2,000 W, starting 5,100 W (1 source)2,0005,100

Sizing a job site: our job site list (a 7-1/4 in circular saw, a 1/2 in drill, a 1 hp air compressor, an LED work light and a heavy duty battery charger) needs about 6,400 running and 10,000 starting watts, because the compressor’s 3,000 W surge sits on top of 5,270 W of running tools. Open the job site list in the calculator.

Grounding on a job site: OSHA says a portable generator’s frame can serve as the ground only when it feeds equipment on the generator or cord-and-plug tools through its own receptacles; otherwise a grounding electrode such as a ground rod is required. Ask a licensed electrician about your setup.

06 Cords

Generator cords for the loads on this chart

Use a heavy-duty outdoor cord whose wattage rating is higher than the total of everything plugged into it, with all three prongs (CPSC).

  • OSHA calls for heavy-duty cords with a grounding conductor (3-wire cord and 3-pronged connectors) and says not to use underrated cords.
  • Westinghouse warns that extension cords run directly into the home raise the risk of carbon monoxide coming in through the openings.
  • Thicker wire (a lower gauge number) carries more current over longer runs. The cord gauge tables from DuroMax and Westinghouse are on our generator safety page; follow your generator's manual where they differ.
  • A 30 amp locking cord (L14-30) runs from the generator to a transfer switch or inlet, not to appliances. Connecting to house wiring takes a transfer switch or an approved interlock installed by a licensed electrician.

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See all 30 amp (L14-30) generator cords on Amazon (opens Amazon in a new tab) See all 50 amp generator cords on Amazon (opens Amazon in a new tab)

The 50 amp listings are lesser-known brands; check the plug and connector types against your generator's outlet before you buy.

07 Questions

How many watts does it use?

How many watts does a TV use?

About 240 watts for a 32 to 55 inch TV, the middle of Champion’s 80 to 400 W range, with no starting surge. Smaller sets draw less: Honda lists a 20 inch flat screen at 120 W and a 46 inch at 190 W, and Briggs and Stratton a 32 inch LCD at 75 W.

How many watts does a microwave use?

About 900 watts, the middle of Champion’s 600 to 1,200 W range. The number on the door is cooking power, not the draw: Honda lists a 1,000 watt microwave oven at 1,500 running watts. Range in our sources: running 600 to 1,500 W, starting 1,000 to 2,000 W (5 sources).

How many watts does a coffee maker use?

About 800 watts (Champion flyer), with no motor surge. Range in our sources: running 600 to 1,500 W, starting 600 W (5 sources), so a big drip machine can draw close to 1,500 W while it heats.

How many watts does a dryer use?

An electric dryer runs on about 5,000 watts (Champion, 4,000 to 6,000 W) and Honda lists it as a 240 V load. Briggs and Stratton adds 9,000 W of starting surge on top of 3,600 running. A gas dryer only spins the drum and runs the controls: about 1,800 running and 6,300 starting watts (Briggs and Stratton, the only source we found).

How many watts does a washing machine use?

About 750 running and 1,650 starting watts, the middle of Champion’s 500 to 1,000 W running and 1,000 to 2,300 W starting ranges. Range in our sources: running 500 to 1,200 W, starting 1,000 to 3,350 W (5 sources).

How many watts does a window air conditioner use?

By Champion’s chart, a 5,000 BTU unit runs on about 530 watts and starts at about 1,050, and a 10,000 BTU unit runs on about 1,050 and starts at about 2,100. Sources disagree on bigger units: Briggs and Stratton and Generac list a 12,000 BTU unit at 3,250 running watts, while Amana rates its 15,000 BTU model at 1,260 watts. Check the nameplate.

How many watts does a water heater use?

An electric tank water heater runs on about 3,750 watts (Champion, 3,000 to 4,500 W) and Honda lists it as a 240 V load. Tankless electric units draw far more: Stiebel Eltron’s Tempra models are rated 12,000 to 36,000 W. A gas water heater is not on our chart.

How many watts does central air use?

By Champion’s chart, a 2 ton unit runs on about 2,250 watts and starts at about 4,000, a 3 ton unit runs on about 3,250 and starts at about 5,500, and a 4 ton unit runs on about 4,500. Generac warns that a 3 ton unit can demand 15,000 to 18,000 starting watts, so read the starting figure or locked rotor amps on your condenser’s data tag.

How many watts does an electric blanket use?

About 100 watts, from the EWEB appliance table, with no starting surge. It is one of the smallest loads on the chart.

What size generator does a job site need?

Our job site list needs about 6,400 running and 10,000 starting watts, mostly because of the 1 hp air compressor’s surge. Drop the compressor or start it first, before other tools, and the number falls. Add your own tools in the calculator.

Sources: Champion wattage chart, Honda wattage guide, Briggs and Stratton worksheet, Generac, DTE Energy worksheet, EWEB appliance table, CPSC, OSHA grounding fact sheet, and the other makers named in each row. All read October 17, 2026.

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