Energy Converter
Convert energy between joules, calories, kilocalories, kilowatt-hours, BTU and watt-hours.
1 Kilocalories (kcal / food Cal) =
4.184
Kilojoules (kJ)
All conversions
- Joules (J)
- 4,184
- Kilojoules (kJ)
- 4.184
- Calories (cal)
- 1,000
- Watt-hours (Wh)
- 1.162222
- Kilowatt-hours (kWh)
- 0.001162
- BTU
- 3.965667
How to use the Energy Converter
- 1Enter the amount you want to convert in the Value field.
- 2Pick the unit you are converting from and the unit you are converting to.
- 3Read the converted result instantly, or use ⇄ to swap the units.
- 4Scroll the “All conversions” panel to see the value in every other unit at once.
Frequently Asked Questions
▸Are food calories the same as calories?
Food 'Calories' (capital C) are actually kilocalories — 1 food Calorie = 1,000 small calories = 4,184 joules.
▸How many joules in a kWh?
1 kilowatt-hour = 3.6 million joules — the energy of a 1,000 W appliance running for one hour.
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