Electricity Cost Calculator
Find the wattage on the appliance label, enter how many hours a day it runs, and your price per kWh.
W
h
¢/kWh
Default rate: US average residential rate of 18.56¢/kWh (EIA, March 2026, via Jouleio). Your bill shows your own rate per kWh.
Result–
Typical appliance costs
| Appliance | Typical watts | Hours a day | kWh a month | Cost a month |
|---|---|---|---|---|
| TV | 100 W | 5 | 15 | $2.82 |
| Space Heater | 1,500 W | 6 | 274 | $50.81 |
| Refrigerator | 60 W | 24 | 44 | $8.13 |
| Mini Fridge | 30 W | 24 | 22 | $4.07 |
| Ceiling Fan | 50 W | 8 | 12 | $2.26 |
| Dehumidifier | 500 W | 8 | 122 | $22.58 |
| Window AC Unit | 900 W | 8 | 219 | $40.65 |
| Gaming PC | 400 W | 4 | 49 | $9.03 |
| Electric Blanket | 100 W | 8 | 24 | $4.52 |
| Hot Tub | 1,500 W | 8 | 365 | $67.75 |
At the US average residential rate of 18.56¢/kWh (EIA, March 2026, via Jouleio).
kWh per day = watts × hours ÷ 1,000
Cost = kWh × price per kWh
Questions
How do I find an appliance's wattage?
Check the label or nameplate on the back or bottom. If it lists amps instead, multiply amps by 120 volts to get watts.
What is a kWh?
One kilowatt-hour is 1,000 watts used for one hour, such as a 100 W TV running for 10 hours.