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The experts at Electric Generators Direct have created a wattage calculator to help customers choose a generator that meets their needs.

Wattage Calculator

How to Determine Which Size Generator You Need

Jim, the Generator Expert
By
Product Expert
Electric Generators Direct
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Wattage Calculator

Some folks try to size a generator based on the square footage of their home.

But the best way to do it is to determine what appliances you want to power.

Once you've decided all the appliances you need to power during a blackout, just select them from our wattage calculator below.

After you've selected all the appliances, the calculator will tell you what size generator you need, in terms of wattage.

Please note, these calculations are a general guideline and may differ slightly from your appliance.

Appliance NameWattage
Central Air Conditioner12000
Window Air Conditioner3000
Alarm Clock10
Coffeemaker1050
Clothes Washer2000
Clothes Dryer6800
Dishwasher(hot dry)1600
Electric Blanket80
Celing Fan120
Window Fan200
Furnace2500
Whole House Fan500
Freezer2200
Hair Dryer1600
Central Gas Furance400
Central Oil Furnace1500
Electric Portable Heater1800
Incandescent Lightbulb100
Fluorescent Lightbulb25
Microwave1000
Desktop800
Laptop250
Stereo250
Range(electric)2000
Refrigerator2200
Sump pump 1/3HP1300
Sump pump 1/2HP2150
TV300
Toaster800
Toaster oven1225
Water Heater5000
Well pump 1/2HP2200
Check the items you need to power to find the amount of Wattage necessary for your generator.

Recommended Minimum Watts
Needed: 

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Wattage Calculator - Find out How to Determine Which Size Generator You Need. Electric Generators Direct has expert advice about How to Pick the Perfect Portable Generator, How to Pick the Perfect Standby Generator, and How to Easily Unload a Generator. Our generator how-to library can help you pick the perfect generator, transfer switch or generator accessory.