1 kilojoule = 0.239006 kilocalories
Convert kilojoules to kilocalories.
Both directions on one page — swap the units and the whole thing runs backwards.
Type a value, or “5cm to in”
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The formula
kcal = kJ × 0.239006
Worked through with a real value: 10 kilojoules = 2.39006 kilocalories.
Going the other way: kJ = kcal × 4.184, so 1 kilocalorie = 4.184 kilojoules.
What each unit is
- kilojoule kJ
- A thousand joules, the everyday metric unit for food energy and machine work.
- kilocalorie kcal
- 1,000 thermochemical calories, also called a food Calorie or kilogram calorie. Nutrition labels use this unit.
Where these come from
- 1 kilojoule = 1000 joules
- 1 kilocalorie = 4184 joules
Every other number on this page is computed from those, and each category is pinned to conversions worked out by hand from the units' primary definitions before it ships.
Conversion tables
| kilojoules (kJ) | kilocalories (kcal) |
|---|---|
| 1 | 0.239006 |
| 2 | 0.478011 |
| 3 | 0.717017 |
| 4 | 0.956023 |
| 5 | 1.19503 |
| 6 | 1.43403 |
| 7 | 1.67304 |
| 8 | 1.91205 |
| 9 | 2.15105 |
| 10 | 2.39006 |
| 20 | 4.78011 |
| 25 | 5.97514 |
| 50 | 11.9503 |
| 75 | 17.9254 |
| 100 | 23.9006 |
| kilocalories (kcal) | kilojoules (kJ) |
|---|---|
| 1 | 4.184 |
| 2 | 8.368 |
| 3 | 12.552 |
| 4 | 16.736 |
| 5 | 20.92 |
| 6 | 25.104 |
| 7 | 29.288 |
| 8 | 33.472 |
| 9 | 37.656 |
| 10 | 41.84 |
| 20 | 83.68 |
| 25 | 104.6 |
| 50 | 209.2 |
| 75 | 313.8 |
| 100 | 418.4 |
Questions
How many kilocalories are in a kilojoule?
1 kilojoule = 0.239006 kilocalories.
How do I convert kilojoules to kilocalories?
Use kcal = kJ × 0.239006. For example, 10 kilojoules = 2.39006 kilocalories.
How many kilojoules are in one kilocalorie?
1 kilocalorie = 4.184 kilojoules.
What is 10 kilojoules in kilocalories?
10 kilojoules = 2.39006 kilocalories.
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