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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 13.5 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 $0.135 by the calculated kWh.

Appliance/Device Average Wattage Frequency of Use Cost per 30 Day Month
Air Conditioner - Window 1,500 8 hr./day $48.60
Air Conditioner - Central 2-ton 2,500 8 hr./day $81.00
Air Purifier 50 12 hr./day $2.43
Attic Fan 370 12 hr./day $17.98
Automatic Blanket 150 8 hr./day $4.86
Blender 250 1 hr./mo. $0.03
Bug Zapper 100 24 hr./day $9.72
Ceiling Fan - Low Setting 10 6 hr./day $0.24
Ceiling Fan - High Setting 100 6 hr./day $2.43
Cell Phone Charger 10 4 hr./day $0.16
Ceramic Space Heater 1,500 8 hr./day $48.60
Clock Radio 30 24 hr./day $2.92
Clothes Dryer 4,000 16 loads/mo. $8.64
Clothes Washer 400 16 loads/mo. $0.86
Coffee Maker 1,000 1 hr./day $4.05
Computer - Average Use 75 5 hr./day $1.52
Computer Monitor - 17" CRT 100 5 hr./day $2.03
Computer Monitor - 19" LCD 25 5 hr./day $0.51
Dehumidifier 480 12 hr./day $23.33
Dishwasher 1,200 16 loads/mo. $2.59
Food Freezer - 20 year old 160 24 hr./day $15.55
Food Freezer - New model 80 24 hr./day $7.78
Frying Pan 1,200 2 hr./mo. $0.32
Hair Dryer 1,250 5 min./day $0.42
Heat Pump - 2-ton Heating with electric strips on very cold days 15,000 6 hr./day $364.50
Heat Pump - 2-ton Heating 3,750 8 hr./day $121.50
Heat Pump - 2-ton Cooling 2,750 8 hr./day $89.10
Hot Tub - Well Insulated 3,000 Cycling 15% on 85% off $43.74
Humidifier 120 120 hr./mo. $1.94
Iron 1,100 5 hr./mo. $0.74
Lighting - Incandescent - 60 watts 60 8 hr./day $1.94
Lighting - Incandescent - 100 watts 100 8 hr./day $3.24
Lighting - LED - 10 watts (equivalent to 60-watt incandescent) 10 8 hr./day $0.32
Lighting - LED - 16 watts (equivalent to 100-watt incandescent) 16 8 hr./day $0.52
Microwave Oven 1,000 10 min./day $0.67
Motor 1HP 1,000 10 hr./day $40.50
Mixer 127 30 min./month $0.01
Oven 2,625 1 hr./day $10.63
Radio/Stereo 100 1 hr./day $0.41
Range - large burner 2,400 30 min./day $4.86
Refrigerator - 22 cu. ft. - 20 year old model 185 24 hr./day $17.98
Refrigerator - 22 cu. ft. - new model 76 24 hr./day $7.39
Swimming Pool Pump - 1HP 1,000 12 hr./day $48.60
Television - 36 inch CRT 200 4 hr./day $3.24
Television - 50 inch LCD 150 4 hr./day $2.43
Television - 50 inch LED 100 4 hr./day $1.62
Toaster 1,100 5 min./day $0.37
Vacuum Cleaner 630 2 hr./mo. $0.17
Video Game Console 110 2 hr./day $0.89
Well Pump 1,000 1 hr./day $4.05
Water Heater 4,000 3 hr./day $48.60

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