Energy converter
Convert food energy and electrical energy between kcal, kJ, cal, J, Wh and kWh.
kcal
kJ
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1 joule in other energy units
| Unit | Value |
|---|---|
| Kilojoules (kJ) | 0.001 kJ |
| Calories (cal) | 0.2390057 cal |
| Kilocalories (kcal) | 0.0002390057 kcal |
| Watt-hours (Wh) | 0.0002777778 Wh |
| Kilowatt-hours (kWh) | 2.77778 × 10^-7 kWh |
About energy units
The joule is the SI unit of energy. The food Calorie is a kilocalorie, equal to exactly 4.184 kJ. One kilowatt-hour, the unit on electricity bills, is 3.6 million joules.
Where energy conversions are used
Energy conversions are used to read food labels from different countries, track nutrition and fitness, and compare electricity and battery capacities.
Conversion factors use exact international definitions where they exist (for example 1 inch = 2.54 cm and 1 lb = 0.45359237 kg). Results are rounded for display only.