Kilocalories to Kilojoules Converter
Convert kilocalories to kilojoules instantly. 1 kcal = 4.184 kJ. Free two-way converter with the formula and a quick reference table.
How to convert kilocalories to kilojoules
kilojoules = kilocalories × 4.184
One kilocalorie equals 4.184 kilojoules, so to convert kilocalories to kilojoules you multiply by 4.184. Going the other way, one kilojoule is 0.239006 kilocalories. Both units measure energy, so the conversion is an exact ratio that never changes.
10 kilocalories = 41.84 kilojoules. Multiply your kilocalorie figure by the factor above (or just type it into the box) to convert any amount.
Need the other direction? kilojoules to kilocalories
kilocalories to kilojoules table
| kilocalories (kcal) | kilojoules (kJ) |
|---|---|
| 1 | 4.184 |
| 2 | 8.368 |
| 3 | 12.552 |
| 5 | 20.92 |
| 10 | 41.84 |
| 20 | 83.68 |
| 25 | 104.6 |
| 50 | 209.2 |
| 100 | 418.4 |
| 250 | 1,046 |
| 500 | 2,092 |
| 1,000 | 4,184 |
Frequently asked questions
How many kilojoules are in a kilocalorie?
One kilocalorie equals 4.184 kilojoules. So to convert, multiply the number of kilocalories by 4.184.
How do I convert kilocalories to kilojoules?
Multiply by 4.184, or simply enter the value in the converter above — it does the math instantly and works both ways.
Is this conversion exact?
Yes — both units measure the same quantity, so the ratio is fixed and this uses the standard internationally-agreed factor.