Calories to kJ Converter
Convert Calories (kilocalories) to kilojoules and back, the energy units used on nutrition labels.
Independently verified for accuracy
Calculator by Toolsloft ↗- Result
- 4.184 Kilojoules (kJ)
- Conversion
- 1 Kilocalories (kcal) = 4.184 Kilojoules (kJ)
Convert Calories to kilojoules, the switch you need when a recipe or label lists food energy one way and you need it the other. Kilocalories default here because a food Calorie is a kilocalorie.
How this is calculated
A food Calorie is a kilocalorie, and one kilocalorie equals exactly 4.184 kilojoules under the thermochemical calorie definition. Kilocalories are multiplied by 4.184 to get kilojoules.
How to use
- Enter the number of Calories (kilocalories).
- Keep kcal to kJ, or press Swap to convert kilojoules back to Calories.
- Read the result in kilojoules.
Examples
- Daily intake:
2000 kcal = 8368 kJ - One Calorie:
1 kcal = 4.184 kJ - Meal:
650 kcal = 2719.6 kJ
FAQ
- How many kJ is one Calorie?
- One food Calorie (a kilocalorie) is 4.184 kilojoules. So 2000 Calories is 8368 kilojoules.
- Are Calories and calories the same?
- No. A food Calorie with a capital C is a kilocalorie, which is 1000 of the smaller calories used in physics.