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HOW MANY WATTS
DO YOU NEED?
Generator Sizing
Household Electrical Appliances
APPLIANCE WATTS APPLIANCE WATTS
Radio AM/FM. . . . . . . . . . .50 / 200 Iron . . . . . . . . . . . .
. . . . . . . 1200
Radio CB . . . . . . . . . . . . . . . . . .50 Blender* . . . . . . .
. . . . . . . . . . 300
100 W. Light Bulb . . . . . . . . . . .100 Juicer* . . . . . . . . . .
. . . . . . . . .300
500 W. Floodlight . . . . . . . . . . .500 Mr. Juicer II* . . . . . .
. . . . . . . .500
1000 W. Floodlight . . . . . . . . . 1000 Power Juicer* (Jack LaLane).
. . 700
Clock . . . . . . . . . . . . . . . . . . . . . 4 Waffle Iron . . . .
. . . . . . . . . . 1100
Window Fan . . . . . . . . . . . . . . .250 Electric Frying Pan . . .
. . . . . . 1150
Compact Disc Player & Radio . . 85 Electric Grill . . . . . . . .
. . . . . ..1250
Stereo & Turntable . . . . . . . . . 100 Hot Plate . . . . . . . .
. . . . . . . . .1500
Color TV . . . . . . . . . . . . .300 / 400 Toaster . . . . . . . . .
. . . . . . . . .1100
VCR . . . . . . . . . . . . . . . . . . . . 100 Toaster ( 4 slice ) .
. . . . . . . . . 1800
DVD . . . . . . . . . . . . . . . . . . . . . 80 Toaster Oven . . . .
. . . . . . . . . 1200
Automatic Washer* . . . . . . . . .1250 Electric Range, (6 inch element)
. . 1500
Clothes Dryer (Gas) . . . . . . . . . 700 Electric Range, (8 inch element)
. . 2100
Clothes Dryer (Electric) . . . . . .5500 Electric Oven .. . . . . . .
. . . . . .4000
Dishwasher* . . . . . . . . . . . . .1500 (hot water wash cycle) Microwave
Oven . . . . . . . . . . . 800
Personal Computer . . . . . .400 / 700 Convection Oven . . . . . . . .
. 1500
Laptop Computer . . . . . . . . . . .50 Food Processor . . . . . . . .
. . . . 400
Printer . . . . . . . . . . . . . . . . . . . .60 Furnace Fan* (1/3 hp)
. . . . . . .1000
Scanner . . . . . . . . . . . . . . . . . . 50 Ceiling Fan. . . . . .
. . . . . . . . . . 30
Zip Drive . . . . . . . . . . . . . . . . . 12 Pelonis Heater . . . .
. . 1000 to 1200
Answering Machine .. . . . . . . . . . 5 Space Heater (avg.) . .1000 to
1500
Freezer* . . . . . . . . . . . . . . . . . .500 GE Space Heater . . .
.1000 to 1500
Refrigirator/Freezer* . . . . . . . . .800 Food Dryer . . . . . . . .
. . . . . . .260
Refrigirator/Freezer* (side x side) . . .950 Hot Tub . . . . . . . . .
. . . . . . . .1700
Vacuum Cleaner* . . . . . . . . . .750 Hot Tub Pump* . . . . . . . . .
. . 750
Bread Maker . . . . . . . . . . . . . . 600 Dehumidifier . . . . . . .
. . . . . . . 650
Electric Blanket . . . . . . . . . . . . 400 Water Conditioner. . . .
. . . . . . . .30
Coffee Grinder . . . . . . . . . . . . .100 Electric Hot Water Heater
. . . 5000
Coffee Maker . . . . . . . . . . . . .1550 (hot water heating element)
Garage Door Opener . . . .. . . . .750
Cappuccino Maker . . . . . . . . .1550 (hot water heating element) Home
Security System . . . . . . .300
Common Tools
ELECTRIC TOOL WATTS ELECTRIC TOOL WATTS
Jig Saw . . . . . . . . . . . . . . . . . .300 Circular Saw* (6 1/2")
. . . . . . 1000
Miter Saw . . . . . . . . . . . . . . . .600 Circular Saw* (7 1/4")
. . . . . . 1200
Sabre Saw* . . . . . . . . . . . . . . 500 Circular Saw* (8 1/4")
. . . . . . 1800
Makita Chop Saw*. . . . . . . . 1550 Impact Wrench* (1") . . . .
. . .1200
Sawzall* . . . . . . . . . . . . . . . . 750 Drill* (1/4") . . .
. . . . . . . . . . . 250ce
Planer . . . . . . . . . . . . . . . . . 1650 Drill* (3/8") . . .
. . . . . . . . . . . 500
Router . . . . . . . . . . . . . . . . . 1200 Drill* (1/2") . . .
. . . . . . . . . . . 750
Jointer . . . . . . . . . . . . . . . . . 1450 Drill Doctor . . . . .
. . . . . . . . . 250
Lathe* . . . . . . . . . . . . . . . . . .900 Portable Grinder* . . .
. . . . . . .1380
Disc Sander . . . . . . . . . . . . . 1200 Concrete Vibrator* (2 hp) .
. . .2250
Drill Press* . . . . . . . . . . . . . . 800 Winch* . . . . . . . . .
. .. . . . . . .1800
Band Saw* . . . . . . . . . . . . . 1200 Electric Chain Saw* (14")
. . . .1200
Table Saw*. . . . . . . . . . . . . .1800 Grass Edger * . . . . . . .
. . . . . 1000
Makita Cut Off Saw* . . . . . . 1000 Weed Trimmer* . . . . . . . . . .
. .500
Airless Sprayer* (1/2 hp) . . . . 750 Electric Lawn Mower*. . . . . .
.1500
Air Compressor* (120v. 1/2 hp) . . .1200 / 2500 Electric Pressure Washer*.
. . . 1200 / 3600
Air Compressor* (120v. 3/4 hp) . . .1750 / 3000 12v Battery Charger. .
. . . . . . . .120
Air Compressor* (120v. 1 hp) . . . . 2500 / 4000 Wet/Dry Shop Vac* (5
h.p.). . 1000
Household Appliances that use Induction Motors
Well Pumps Running Starting
Air Conditioners Running Starting
1/3 Horsepower . . . . . . . . . . . . .750* 1400-3000 5,000 BTU . . .
. . . . . . . . 1250* 1750-3400
1/2 Horsepower . . . . . . . . . . . .1000* 2100-4000
10,000 BTU . . . . . . . . . . . 2400* 3000-4750
3/4 Horsepower . . . . . . . . . . . .1850* 2800-5000
20,000 BTU . . . . . . . . . . . 3250* 4000-6800
1.0 Horsepower . . . . . . . . . . . .2250* 3500-6500 24,000 BTU ( 2 Ton
) . . . . 3750* 4950-8500
1.5 Horsepower . . . . . . . . . . . .2750* 3800-8000
30,000 BTU (2.5 Ton) . . . . 4250* 6000-11,000
Sump Pumps Space 36,000 BTU ( 3 Ton ) . . . . 4900* 9000-16,000
1/3 Horsepower . . . . . . . . . . . . 800* 1300-2900
48,000 BTU ( 4 Ton ) . . . . 6850* 12,800-20,000
1/2 Horsepower . . . . . . . . . . . 1050* 2150-4100 60,000 BTU ( 5 Ton
) . . . . 8000* 15,800-28,000
Submersible Pump Space 90,000 BTU (7.5 Ton) . . . 12,500* 25,000-50,000
400 GPH . . . . . . . . . . . . . . . . . 200* 400-600 Space Space
Heat Pump Space Space Space
3,000 Sq. Ft. Home . . . . . 4000 to 5000* 10,000-12,000
Space Space
To Select a model that has enough power, add the watts for items you
may want to run at the same time. Use the highest total wattage as your
minimum power requirement.
* Appliances and tools with induction motors may require 3 to 7 times
the above listed wattage when starting. Be sure to check the specific
wattage requirements and operating instructions for appliances / tools
to be used.
* Note: The above wattages are estimates. The actual wattage required
for your appliances may differ from those listed above. Check the nameplate
on your appliance to determine the wattage required. For more accurate
wattage readings and to check the performance of your appliances simply
clamp an analog or a digital amp meter around one leg of your power cable.
USEFUL FORMULA; WATTS = VOLTS x AMPS
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