Energy
Convert between joules, calories, watt-hours, and kilowatt-hours.
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Enter a value and choose the source and destination units. Your result updates automatically. The calculation uses the selected units; displayed digits do not improve the accuracy of your original measurement. Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.
Your result
How to use Energy
- Enter the values you want to calculate and choose the relevant units or settings.
- The result updates as you type. Adjust the available settings if needed.
- Review the result, then use Copy result or a download link when available.
What to expect
Convert between joules, calories, watt-hours, and kilowatt-hours. Enter a value and choose the source and destination units. Your result updates automatically. The calculation uses the selected units; displayed digits do not improve the accuracy of your original measurement.
Try a small example
3,600,000 J = 1 kWh