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Formula
kJ = kcal × 4.184
Example
Example: convert 10 kilocalories to kilojoules.
10 kcal = 41.84 kJ
Conversion table
| kilocalories (kcal) | kilojoules (kJ) |
|---|---|
| 1 kcal | 4.184 kJ |
| 2 kcal | 8.368 kJ |
| 5 kcal | 20.92 kJ |
| 10 kcal | 41.84 kJ |
| 20 kcal | 83.68 kJ |
| 50 kcal | 209.2 kJ |
| 100 kcal | 418.4 kJ |
Explanation
These are both units.
How to convert kilocalories to kilojoules
- Start with the value in kilocalories (kcal).
- Multiply it by 4.184.
- The result is the measurement in kilojoules (kJ).
Example: 10 kcal → 41.84 kJ
Frequently Asked Questions
How much is 10 kilocalories in kilojoules?
10 kilocalories equals 41.84 kilojoules.
How many kilojoules is 1 kilocalorie?
1 kilocalorie equals 4.184 kilojoules.
How many kilocalories is 1 kilojoule?
1 kilojoule equals 0.239005736138 kilocalories.
What is the difference between kilocalories and kilojoules?
Both measure energy in SI. The main difference is usually scale: some units are convenient for smaller values, while others are used to express larger values more practically.
Where are kilocalories and kilojoules used?
They are used in physics and engineering to measure work, energy, and heat; the most practical unit depends on the magnitude.
Why does 1 kilocalorie equal 4.184 kilojoules?
Because the units are defined with a fixed relationship. To convert kilocalories to kilojoules, multiply by that factor.