The short answer
- 1 kJ ≈ 0.2390057 kcal
- 1 kcal = 4.184 kJ
Worked example8,700 kJ ÷ 4.184 = 2,079.35 kcal
UNIT CONVERSION
← Energy converterKilojoules to kilocalories
To convert kilojoules to kilocalories, divide the number of kilojoules by 4.184.
What the units mean
Kilojoule. The kilojoule is 1,000 joules, the SI unit of energy. Food labels in Australia, New Zealand and the EU give energy in kJ.
Kilocalorie. The kilocalorie, written as 'Calories' on food labels, is 4,184 joules (thermochemical definition).
Kilojoules to kilocalories table
| Kilojoules (kJ) | Kilocalories (kcal) |
|---|---|
| 1 | 0.2390057 |
| 10 | 2.390057 |
| 100 | 23.90057 |
| 200 | 47.80115 |
| 250 | 59.75143 |
| 500 | 119.5029 |
| 750 | 179.2543 |
| 1,000 | 239.0057 |
| 1,500 | 358.5086 |
| 2,000 | 478.0115 |
| 4,000 | 956.0229 |
| 6,000 | 1,434.034 |
| 8,000 | 1,912.046 |
| 8,700 | 2,079.35 |
| 10,000 | 2,390.057 |
| 12,000 | 2,868.069 |
Values are rounded to 7 significant figures.
Common questions
How do I convert kilojoules to kilocalories?
Divide the number of kilojoules by 4.184. For example, 8,700 kJ ÷ 4.184 = 2,079.35 kcal.
How many kilocalories are in one kilojoule?
One kilojoule is about 0.2390057 kilocalories.
Is this conversion exact?
Yes. Both units have exact legal definitions, so the factor is exact. Values on this page are rounded to 7 significant figures.