Electricity Cost Calculator
Enter an appliance’s wattage, how long it runs and your electricity rate to estimate the energy used and the cost.
Estimated result—
How it works
Energy = watts ÷ 1000 × hours. Cost = energy in kWh × electricity price.
Example
A 2,000 W heater used for 3 hours at $0.35/kWh uses 6 kWh and costs about $2.10.
Useful things to know
- Check the appliance label for rated watts.
- Thermostatic appliances may cycle on and off, so real usage can be lower than the rated maximum.
- Use your bill’s usage rate rather than the total bill divided by kWh if fixed charges are included.
About this estimate
HandyNumbers calculations run in your browser. Results are general estimates and can differ from real-world outcomes because of fees, taxes, tariffs, product specifications, rounding and individual circumstances.