Kilojoules to Kilocalories Converter
1 kilojoule ≈ 0.239005736 kilocalories
This is the unit written as "Calories" on nutrition labels.
1 kilojoule equals 0.239006 kilocalories
How to convert kilojoules to kilocalories
Calories here are thermochemical (4.184 J), while BTU uses the International Table definition. A kilowatt-hour is energy (3.6 MJ), not power; a food Calorie is a kilocalorie.
kcal = kJ × 0.2390057361One kilojoule is 0.2390057361 kilocalories, so a single multiplication converts any value.
2.39006 kcal ≈ 10 × 0.2390057361This is the unit written as "Calories" on nutrition labels.
Kilojoules to kilocalories conversion table
Common values in kilojoules, converted to kilocalories.
| Kilojoules (kJ) | Kilocalories (kcal) |
|---|---|
| 1 | 0.23900574 |
| 2 | 0.47801147 |
| 3 | 0.71701721 |
| 4 | 0.95602294 |
| 5 | 1.1950287 |
| 10 | 2.3900574 |
| 20 | 4.7801147 |
| 25 | 5.9751434 |
| 50 | 11.950287 |
| 100 | 23.900574 |
| 250 | 59.751434 |
| 500 | 119.50287 |
| 1,000 | 239.00574 |
About these units
kilojoulekJ
One thousand joules. The metric food-energy unit outside the United States.
kilocaloriekcal
One thousand thermochemical calories: exactly 4,184 joules.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.