Calories to Kilojoules
Convert kilocalories to kilojoules and back. European and Australian labels use kilojoules.
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Common values
Formula
kJ = kcal × 4.184
One kcal is 4.184 kJ, so a 2,000 kcal daily intake is about 8,368 kJ. The "calories" on a label are really kilocalories.
Frequently asked questions
QHow many kJ is 1 kcal?
1 kcal is 4.18 kJ, and 10 kcal is 41.84 kJ. Type any value in the box above to convert instantly.
QAnd how many kcal is 1 kJ?
1 kJ is 0.24 kcal. This converter works both ways, so typing in the right box updates the left one.
QWhere is this unit used?
One kcal is 4.184 kJ, so a 2,000 kcal daily intake is about 8,368 kJ. The "calories" on a label are really kilocalories.
Other converters
Traditional units (geun, doe, majigi and so on) vary by region and product.