Convert kilocalories (food Calorie) (kcal) to kilojoules (kJ).
Edit either value. Decimals and scientific notation supported.
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1 kcal ≈ 4.184 kJ
Precision changes displayed rounding, not calculation accuracy.
kJ = kcal × 4.184kJ = kcal × 4.184
Multiply the kcal reading by 4.184.
1 kcal ≈ 4.184 kJ
1 × 4.184 ≈ 4.184
100 kcal ≈ 418.4 kJ
100 × 4.184 ≈ 418.4
A food Calorie is a kilocalorie: 1 kcal = 1,000 cal. This tool uses the thermochemical calorie of exactly 4.184 J.
Fixed reference · Kilocalorie (food Calorie) to Kilojoule
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
| Kilocalorie (food Calorie) (kcal) | Kilojoule (kJ) |
|---|---|
| 0 | 0 |
| 0.1 | 0.4184 |
| 0.5 | 2.092 |
| 1 | 4.184 |
| 2 | 8.368 |
| 5 | 20.92 |
| 10 | 41.84 |
| 25 | 104.6 |
| 50 | 209.2 |
| 100 | 418.4 |
| 1000 | 4184 |
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