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Estimated Monthly kWh Usage

The data on this page represents the estimated monthly kilowatt-hour usage for many common household appliances and electrical devices. Please remember that these are only estimated averages and that exact power consumption varies based on brand, size, age and several other factors. The following data shows the appliance or device, its average wattage, its frequency of use in an average household and the estimated cost based on 10 cents per kWh. The cost is based on 30 days of use at the frequency indicated. To calculate kWh usage the following formula is used: Device Wattage multiplied by hours used then divided by 1000. To get the cost you then multiply $0.10 by the calculated kWh.

Appliance/Device Average Wattage Frequency of Use Cost per 30 Day Month
Air Conditioner - Window 1,500 8 hr./day $36.00
Air Conditioner - Central 2-ton 3,000 8 hr./day $72.00
Air Purifier 50 12 hr./day $1.80
Attic Fan 370 12 hr./day $13.32
Automatic Blanket 150 8 hr./day $3.60
Blender 250 1 hr./mo. $0.03
Bug Zapper 100 Continuous $7.20
Ceiling Fan - Low Setting 10 6 hr./day $0.18
Ceiling Fan - High Setting 100 6 hr./day $1.80
Ceramic Space Heater 1,500 8 hr./day $36.00
Clock 4 Continuous $0.29
Clothes Dryer 5,000 16 loads/mo. $4.00
Clothes Washer 600 16 loads/mo. $0.48
Coffee Maker 1,500 Twice/daily $0.75
Computer - Average Use 150 5 hr./day $4.50
Computer Monitor - 17" CRT 100 5 hr./day $1.50
Computer Monitor - 17" LCD 40 5 hr./day $0.60
Dehumidifier 700 12 hr./day $25.20
Dishwasher 1,200 Once/daily $1.80
Electric Furnace 15,000 8 hr./day $360.00
Food Freezer 350 Cycling 1/2 on 1/2 off $12.60
Frying Pan 1,200 2 hr./mo. $0.24
Hair Dryer 1,250 5 min./day $0.31
Heat Pump - 2-ton Heating 3,750 8 hr./day $90.00
Heat Pump - 2-ton Cooling 2,750 8 hr./day $66.00
Hot Tub - Well Insulated 5,500 Cycling 15% on 85% off $59.00
Humidifier 200 60 hr./mo. $1.20
Iron 1,100 8 hr./mo. $0.88
Lamp 100 3 hr./day $0.90
Lighting - small home 1,160 6 hr./day $20.88
Lighting - large home 4,000 6 hr./day $72.00
Microwave Oven 1,450 10 min./day $0.73
Motor 1HP 1,000 10 hr./day $30.00
Mixer 127 30 min./month $0.01
Oven 2,900 20 hr./mo. $5.80
Radio/Stereo 110 1 hr./day $0.33
Range - large burner 2,400 30 min./day $3.60
Refrigerator - 20 cu. ft. 600 Cycling 1/2 on 1/2 off $21.60
Swimming Pool Pump - 1HP 1,000 24 hr./day $72.00
Television - 36 inch 200 4 hr./day $2.40
Television - 43 inch Plasma 300 4 hr./day $3.60
Toaster 1,100 10 min./day $0.55
Vacuum Cleaner 630 2 hr./mo. $0.13
Video Game Console 125 1 hr./day $0.38
Well Pump - deep well 1,500 2 hr./day $9.00
Water Heater 4,000 3 hr./day $36.00

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