What is the Energy Converter?
Convert energy between joules, calories, kilocalories, kilowatt-hours and BTU.
Results update as you type, and nothing you enter leaves your device.
How it is calculated
kilocalories = kilojoules × 0.23900574
How to use it
- Fill in the fields at the top of the page.
- Read the result in the results panel. It updates as you type.
- Change any value to compare scenarios, or use Share to send the result as a link.
Common questions
How do I convert kilojoules to kilocalories?
Multiply the value in kilojoules by 0.23900574. For example, 10 kilojoules = 2.3901 kilocalories.
How do I convert kilocalories back to kilojoules?
Divide by 0.23900574, or press the swap button between the two unit boxes.
What formula does the Energy Converter use?
It uses: kilocalories = kilojoules × 0.23900574.
Is the Energy Converter free, and is my data stored?
It is free with no sign-up. The calculation runs in your browser, so the values you enter are not sent to or stored on our server.