Energy Converter
Convert energy units — joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, BTU and electronvolts. Type a value to see the result instantly, together with a table of every other unit.
This tool runs entirely in your browser.
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How to use the Energy Converter
- 1Enter a value.
- 2Choose the unit to convert from and to (use ⇄ to swap).
- 3Read the result, or scan the table for every unit at once.
What is the Energy Converter?
One food Calorie is one kilocalorie (4.184 kJ). One kilowatt-hour equals 3.6 megajoules.
Results show up to 10 significant digits; very large or small values switch to scientific notation.
Frequently asked questions
How many kJ are in a kcal?
4.184 kJ.
Is the Energy Converter free and private?
Yes. The Energy Converter is free, needs no account, and runs entirely in your browser. What you type is never sent to a server or stored.
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