Energy Converter
Convert between joules, calories, kWh, BTU, electronvolts and more.
1 kJ = 0.23900574 kcal
1 kJ in other units
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How It Works
Enter a value
Type the amount you want to convert into the From field.
Pick your units
Choose the source unit and the target energy unit from the dropdowns.
Read the result
The converted value appears instantly, plus a table of all other units.
The Energy Converter instantly converts between 10 different energy units. Convert between joules, calories, kWh, BTU, electronvolts and more. All calculations happen locally in your browser, so conversions are immediate and your data never leaves your device.
Need a different measurement? Browse the full set of converters — length, weight, volume, temperature, speed, area, pressure, energy, power, data and more — from the unit converter hub.
Frequently Asked Questions
How do I convert kilojoule to kilocalorie (food cal)?
Enter a value in the "From" box, make sure the unit is set to Kilojoule, then choose Kilocalorie (food cal) in the "To" box. The converted result appears instantly, along with the value expressed in every other energy unit.
What energy units are supported?
This converter supports 10 units: Joule, Kilojoule, Calorie (cal), Kilocalorie (food cal), Watt-hour, Kilowatt-hour, Electronvolt, British Thermal Unit, Foot-pound, Therm (US).
Is the Energy converter free and accurate?
Yes. It is completely free, requires no sign-up, and runs entirely in your browser using internationally standardized conversion factors, so results are accurate to many significant figures.
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