Energy Unit Converter (Joule, Cal, kWh)
Calculators✨ Free TodayConvert between Joules, Calories (cal), Kilocalories (kcal), Kilowatt-hours (kWh), BTU, and electronvolts.
Conversions in All Energy Units
Joule (J)
1000
Gram Calories (cal)
239.005736
Kilocalories / Food Calories (kcal)
0.239006
Kilowatt-Hour (kWh)
0.000278
British Thermal Unit (BTU)
0.947813
Electronvolt (eV)
6.2415e+21
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How to Use Energy Unit Converter (Joule, Cal, kWh)
1
Enter Value
Type the energy quantity to convert.
2
Select Source Unit
Choose Joules, Calories, kWh, or BTU.
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