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Kilocalorie to Kilojoule Converter

Convert Kilocalorie to Kilojoule instantly — live results with exact conversion factors.

4.184 kJ

Answer

1 kilocalorie = 4.184 kilojoules. To convert kcal to kJ, multiply by 4.184.

Quick Reference Table

Kilocalorie (kcal) Kilojoule (kJ)
1 4.184
2 8.368
5 20.92
10 41.84
20 83.68
50 209.2
100 418.4
250 1046
500 2092
1000 4184

Formula

Convert Kilocalorie (kcal) to Kilojoule (kJ) using the relationship: 

kJ = kcal × 4.184

How to Convert

  1. Take the value in kilocalories (kcal).
  2. Multiply it by 4.184 (the conversion factor from kcal to kJ).
  3. The result is the equivalent value in kilojoules (kJ).
  4. Example: 1 kcal = 4.184 kJ.

Reverse Conversion

Need it the other direction? Kilojoule to Kilocalorie conversion.

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FAQ

▸ How many kilojoules are in 1 kilocalorie?

1 Kilocalorie equals 4.184 kilojoules. Multiply by 4.184 to convert kcal to kJ.

▸ What is the formula to convert kilocalorie to kilojoule?

Multiply the value in kilocalories by 4.184 to get kilojoules. Formula: kJ = kcal × 4.184.

▸ How do I convert kilocalories to kilojoules easily?

Enter your value in the converter at the top of this page — the kilojoules result updates live as you type. You can also multiply by 4.184 directly.