Wattage Calculator

Use this wattage calculator to determine your energy needs for power inverters, electrical power generation or off-the-grid solar and wind power-generating systems.

Average Daily Loads for Common Appliances and Tools

Add the total watts from each piece of equipment you may want to run/start at the same time. The wattage requirements below are estimates. The actual wattage required for your appliances may vary from what's listed. Check your appliances for actual wattage required.
* These appliances may require 3 to 7 times the listed wattage when starting.
EquipmentQuantityRunning WattsHours/day Watt Hours/day
Kitchen Appliances
Coffee Pot (10 Cup)
Coffee Pot (4 Cup)
Microwave
*Refridgerator/Freezer
*Freezer
Stove
Toaster
Home Appliances
Clothes Washer
Clothes Dryer
Vacuum
Fan (3-speed, 12in.)
Hair Dryer
Space Heater
Water Heater
*Well Pump (1/2 HP)
*Sump Pump (1/2 HP)
*Air Conditioner 7,000-10,000 BTU
Home Electronics
TV (32in.)
DVD player
Stereo
Clock Radio
Computer (Desktop w/ Monitor)
Computer (Laptop)
Game Console
Lighting
Light Bulb
Light Bulb (Compact)
Tools
1/4in. Drill
3/8in. Drill
1/2in. Drill
Jig Saw
Band Saw
Table Saw
6 1/2in. Circular Saw
7 1/4in. Circular Saw
8 1/4in. Circular Saw
Disc Sander
Other EquipmentQuantityRunning WattsHours/day Watt Hours/day
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TOTAL WATTS REQUIRED
 
 
Simple plug-in tester gives quick, accurate digital readouts of watt or amp usage. Use for refrigerators, dehumidifiers, space heaters, microwaves, holiday lighting, coffeemakers, hair dryers and more. Essential for calculating power needs for home transfer switches and emergency generator needs.
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Reliance Amwatt Appliance Load Tester
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