Kilojoules to Calories Converter
Convert kilojoules to calories instantly. 1 kJ = 239.01 cal. Free two-way converter with the formula and a quick reference table.
How to convert kilojoules to calories
calories = kilojoules × 239.01
One kilojoule equals 239.01 calories, so to convert kilojoules to calories you multiply by 239.01. Going the other way, one calorie is 0.004184 kilojoules. Both units measure energy, so the conversion is an exact ratio that never changes.
10 kilojoules = 2,390.06 calories. Multiply your kilojoule figure by the factor above (or just type it into the box) to convert any amount.
Need the other direction? calories to kilojoules
kilojoules to calories table
| kilojoules (kJ) | calories (cal) |
|---|---|
| 1 | 239.01 |
| 2 | 478.01 |
| 3 | 717.02 |
| 5 | 1,195.03 |
| 10 | 2,390.06 |
| 20 | 4,780.11 |
| 25 | 5,975.14 |
| 50 | 11,950.29 |
| 100 | 23,900.57 |
| 250 | 59,751.43 |
| 500 | 119,502.87 |
| 1,000 | 239,005.74 |
Frequently asked questions
How many calories are in a kilojoule?
One kilojoule equals 239.01 calories. So to convert, multiply the number of kilojoules by 239.01.
How do I convert kilojoules to calories?
Multiply by 239.01, 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.