Energy Converter
Convert energy between joules, calories, watt-hours, kilowatt-hours, BTU, and more.
About this tool
What is Energy Converter?
Convert common energy measurements including joules, kilojoules, megajoules, calories, kilocalories, watt-hours, kilowatt-hours, and BTU directly in your browser.
How to use
Get your result in a few steps
- 1
Enter an energy value.
- 2
Choose the source unit.
- 3
Choose the target unit.
- 4
Click 'Convert'.
Frequently asked questions
Questions about Energy Converter
Does this support kilowatt-hours?
Yes. Watt-hours and kilowatt-hours are supported.
Are calories and kilocalories separate?
Yes. The converter treats calories and kilocalories as different units.
Does conversion happen locally?
Yes. It runs directly in your browser.
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