Electricity Cost Calculator
Estimate appliance energy use and running cost from wattage and time.
1. Enter your details
kWh = watts × hours ÷ 1000. Rated wattage may differ from actual use; standby power, changing loads and fixed utility charges are excluded.
2. Review your result
Review the example values, then calculate.
Plain text report
Using Electricity Cost Calculator
Estimate appliance energy use and running cost from wattage and time.
- Enter appliance watts, hours used per day, number of days. Use the example to see the expected format.
- Select Calculate to review the result and breakdown.
- Check the assumptions, then copy or download your report.
Example
Load the included example, then adjust it for your own task. Select Calculate to review the result and breakdown.
Questions & answers
Does this save my entries?
Calculations run in your browser. This tool does not save your entries to an account. Third-party advertising may run on this page.
How accurate are the results?
kWh = watts × hours ÷ 1000. Rated wattage may differ from actual use; standby power, changing loads and fixed utility charges are excluded.
Can I export the result?
Yes. Calculate first, then use Copy report or Download report. Changing an input clears the old result.
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