Utilnaro
Category: Converters

Energy Converter

Convert joules, calories, kWh and BTU.

Runs in your browserProcessed locally. Your input never leaves your device.

Converting Energy.

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You can type here too — it converts the other way.

1 kJ = 0.239006 kcal

Exact by definition

The same value in other units

joule
1000 J
kilowatt-hour
0.000277778 kWh
British thermal unit
0.947817 BTU
Settings

Digits kept in the answer. Automatic keeps six, which hides floating-point noise without losing anything real.

Convert a whole list

Paste one conversion per line, written the way you would say it: "5 km to mi". Handy for a column copied out of a spreadsheet.

Details

About this tool

Converts between joules, kilojoules, calories and kilocalories, watt-hours and kilowatt-hours, BTU, therms and electronvolts - the units of food labels, electricity bills, heating specifications and particle physics.

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Ready-made conversions

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Good to know

Questions people actually ask

Is a food calorie the same as a calorie?
No. The "calories" on a food label are kilocalories: 1 kcal is 4184 joules, a thousand times the physicist's calorie. Both units are listed here, so pick the one your source actually used.