Kilocalorie to Kilojoule
Free instant kilocalorie to kilojoule converter. 1 kcal = 4.184 kJ.
Common Kilocalorie to Kilojoule values
| Kilocalorie (kcal) | Kilojoule (kJ) |
|---|---|
| 1 | 4.184 |
| 5 | 20.92 |
| 10 | 41.84 |
| 25 | 104.6 |
| 50 | 209.2 |
| 100 | 418.4 |
| 500 | 2092 |
| 1000 | 4184 |
How does Kilocalorie to Kilojoule conversion work?
Type a value in the Kilocalorie (kcal) field and the equivalent in Kilojoule (kJ) appears instantly to the right. The math uses the exact formula shown above — no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.
Kilocalorie. 1,000 calories. The "Calorie" listed on US food labels is actually a kilocalorie.
Kilojoule. 1,000 joules. Common unit on food labels in metric countries.
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Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.
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