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Kilocalories to Kilojoules Converter

Convert kilocalories to kilojoules by typing a value: the answer appears as you type. One kcal equals 4.184 kJ, so to go from kilocalories to kilojoules you multiply by 4.184. A table of common values is included below.

Quick examples
kcal
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Kilojoules1,046 kJ
The same number of kilojoules in kilocalories
59.7514 kcal
Kilocalories to kilojoules table
Kilocalories (kcal)Kilojoules (kJ)

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      Formula

      Kilojoules = kilocalories × 4.184
      1 kcal = 4.184 kJ
      1 kJ = 0.239006 kcal

      How to use it

      1. Type the number of kilocalories.
      2. Read the result in kilojoules.
      3. Open the table for common values, or use the reverse converter to go from kilojoules to kilocalories.

      Worked examples

      10 kcal in kilojoules

      Kilojoules
      41.84 kJ

      300 kcal in kilojoules

      Kilojoules
      1,255.2 kJ

      Quick reference

      10 kcal = 41.84 kJ. 50 kcal = 209.2 kJ. 100 kcal = 418.4 kJ. 150 kcal = 627.6 kJ. 200 kcal = 836.8 kJ. 250 kcal = 1,046 kJ. 300 kcal = 1,255.2 kJ. 500 kcal = 2,092 kJ.

      Good to know

      The “calorie” on food labels is a kilocalorie (kcal): 4.184 kilojoules. One kilowatt-hour, the unit on an electricity bill, is 3.6 megajoules.

      Questions people ask

      How many kilojoules are in 1 kcal?

      1 kcal is 4.184 kJ.

      How do I convert kilocalories to kilojoules?

      Multiply by 4.184. For example, 200 kcal × 4.184 = 836.8 kJ.

      What is 2,000 kcal in kilojoules?

      2,000 kcal is 8,368 kJ.

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