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Generator Wattage Guide

Wayfair Guides
For more info on purchasing a generator visit our Generator Buying Guide.
In this chart we estimate the wattages of appliances, tools, and other household objects you may be operating. Since these are just estimates, please refer to the tool or appliance's manual for specific wattage measurements. An easy way to determine which generator to buy is: Add up the wattage of everything you want to run at the same time. Then pick a generator with a running wattage rating that matches or exceeds the total load. Items with electric motors require additional surge wattage when they are starting up. Be sure to choose a generator with enough surge wattage to support those items. 

Household ApplianceRunning Wattage RequiredSurge Wattage Required at Startup
Air Conditioner (central)10,00011,250
Air Conditioner (window unit)1,5002,200
Blender400850
Coffee Maker400800
Desktop Computer600-800800
Dishwasher70014,000
Electric Frying Pan1,5001,500
Electric Range
(8-inch element)
2,1002,100
Electric Clothes Dryer1,8005,750
Furnace Fan
(gas or fuel oil, 1/8 HP)
300500
Furnace Fan
(gas or fuel oil, 1/6 HP)
500750
Furnace Fan
(gas or fuel oil, 1/4 HP)
6001,000
Furnace Fan
(gas or fuel oil, 1/3 HP)
7001,400
Furnace Fan
(gas or fuel oil, 1/2 HP)
8752,350
Hair Dryer1,2001,800
Hot Water Heater3,0004,500
LightsAs indicated on bulbAs indicated on bulb
Microwave (625 watts)625800
Radio50-200200
Refrigerator or Freezer7002,200
Security System500500
Small Appliance2001,700
Space Heater1,5001,800
Sump Pump (1/3 HP)8001,300
Sump Pump (1/2 HP)1,0502,150
Television (color)150300
Washing Machine1,1502,300

ComputersRunning Wattage RequiredSurge Wattage Required at Startup
Desktop600-800800
Laptop200-250250
Monitor200-250250
Fax600-800800
Printer400-600600

ToolRunning Wattage RequiredSurge Wattage Required at Startup
8-inch Bench Grinder1,4002,500
7-1/4 inch Circular Saw1,4002,300
Drill (3/8 inch, 4 amps)440600
Drill (1/2 inch, 5.4 amps)600900
Electric Chain Saw 
(14 inch bar, 2 HP)
1,1001,800
Pressure Washer1,2003,600
Sander2501,000
10-inch Table Saw1,8004,500
Remember you most likely won't need to power everything in your home at the same time. Switching from one appliance to another will help to minimize your power needs. 

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