Electricity Cost Estimator
Estimate appliance electricity usage and cost from wattage and runtime. Compare appliance running costs using average power, daily hours, period days, and your per-kWh rate. For cycling appliances, average measured power is more accurate than maximum nameplate power.
Use the tool
Enter your values, then run it. The result is generated in your browser.
Result
Calculated
How to use Electricity Cost Estimator
- Find typical power or measure average usage.
- Enter realistic hours and days of use.
- Read the variable per-kWh price from your bill; handle fixed charges separately.
Formula and assumptions
Energy = watts ÷ 1,000 × hours. Cost = kWh × rate per kWh.
Actual bills include other loads, fixed fees, taxes, rate tiers, and seasonal behavior. This is not electrical safety advice.
Frequently asked questions
Does an appliance use its rated watts constantly?
Not always; cycling devices should use average measured power.
Where is the rate found?
Check the per-kWh charges on the utility bill.
Why is my bill higher?
Other appliances, fees, taxes, and seasonal use contribute.
About this tool
Compare appliance running costs using average power, daily hours, period days, and your per-kWh rate. For cycling appliances, average measured power is more accurate than maximum nameplate power.
No account is required. The tool runs in this browser and this starter build has no form-submission backend. See the method and assumptions before relying on estimates.