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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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