kJ to kcal Converter
Type a value in kilojoules to see it in kilocalories as you type, with the exact formula and a reference chart.
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How this was calculated
- 1 kilocalorie = 4.184 kilojoules
- 1,000 ÷ 4.184 = 239.00574 kcal
| kJ | kcal |
|---|---|
| 50 kJ | 11.9503 kcal |
| 100 kJ | 23.9006 kcal |
| 200 kJ | 47.8011 kcal |
| 250 kJ | 59.7514 kcal |
| 300 kJ | 71.7017 kcal |
| 400 kJ | 95.6023 kcal |
| 500 kJ | 119.503 kcal |
| 600 kJ | 143.403 kcal |
| 750 kJ | 179.254 kcal |
| 800 kJ | 191.205 kcal |
| 1,000 kJ | 239.006 kcal |
| 1,200 kJ | 286.807 kcal |
| 1,500 kJ | 358.509 kcal |
| 2,000 kJ | 478.011 kcal |
| 2,500 kJ | 597.514 kcal |
| 3,000 kJ | 717.017 kcal |
| 4,000 kJ | 956.023 kcal |
| 5,000 kJ | 1,195.03 kcal |
| 6,000 kJ | 1,434.03 kcal |
| 8,000 kJ | 1,912.05 kcal |
| 8,700 kJ | 2,079.35 kcal |
| 10,000 kJ | 2,390.06 kcal |
| kcal | kJ |
|---|---|
| 50 kcal | 209.2 kJ |
| 100 kcal | 418.4 kJ |
| 150 kcal | 627.6 kJ |
| 200 kcal | 836.8 kJ |
| 250 kcal | 1,046 kJ |
| 300 kcal | 1,255.2 kJ |
| 350 kcal | 1,464.4 kJ |
| 400 kcal | 1,673.6 kJ |
| 500 kcal | 2,092 kJ |
| 600 kcal | 2,510.4 kJ |
| 700 kcal | 2,928.8 kJ |
| 800 kcal | 3,347.2 kJ |
How to convert kilojoules to kilocalories
1 kilojoule = 0.2390057361 kilocalories. To convert kilojoules to kilocalories, divide by 4.184 (or multiply by 0.2390057361). A kilojoule is 1,000 joules; food labels in Australia, New Zealand and the EU list energy in kJ. A kilocalorie (the food Calorie) is 1,000 thermochemical calories, exactly 4,184 J.
Worked examples
- 250 kilojoules = 59.7514 kcal (250 ÷ 4.184)
- 1,000 kilojoules = 239.006 kcal (1,000 ÷ 4.184)
- 8,700 kilojoules = 2,079.35 kcal (8,700 ÷ 4.184)
Where this conversion comes up
Kilojoules are used for food labels outside the US and exercise machines; kilocalories for nutrition labels, diet plans and fitness trackers. One kilocalorie is exactly 4.184 kJ, so divide: 1,000 kJ is 239 kcal and the 8,700 kJ daily reference intake is 2,079 kcal. Both appear side by side on many labels.
Quick estimate
Divide by 4.2 (0.4% low).
Common mistakes
- Multiplying instead of dividing. A kilocalorie is larger than a kilojoule, so the number of kilocalories must come out smaller: 250 kilojoules = 59.7514 kcal.
- Rounding too early. Keep the full factor until the last step; rounding 0.239 to 0.24 first puts large values noticeably off.
Going the other way? Use the kcal to kj converter. Related energy converters: kj to calories.
Frequently asked questions
How do you convert kilojoules to kilocalories?
Multiply the kilojoules by 0.2390057361 (or divide by 4.184). For example, 1,000 kilojoules is 239.006 kilocalories.
How many kilocalories are in one kilojoule?
One kilojoule is 0.2390057361 kilocalories. A kilojoule is 1,000 joules; food labels in Australia, New Zealand and the EU list energy in kJ.
What is 8,700 kilojoules in kilocalories?
8,700 kilojoules is 2,079.35 kilocalories.
Is there a quick way to estimate kilojoules to kilocalories?
Divide by 4.2 (0.4% low).