Kilojoules to kilocalories
Type a value in either box. 1 kJ = 0.239006 kcal.
Last updated
How to convert
To convert kilojoules to kilocalories, divide by 4.184 (or multiply by 0.239006).
kcal = kJ × 0.239006
For example: 2000 kJ ÷ 4.184 = 478.0115 kcal.
One kilocalorie (a food "Calorie") is defined as exactly 4.184 kilojoules.
In your head: Divide by 4.2: 1,000 kJ ≈ 238 kcal (exactly 239).
When you’ll need it
Australian and New Zealand food labels lead with kilojoules: the 8,700 kJ “average adult” figure on them is about 2,080 kcal.
Common values
| Kilojoules (kJ) | Kilocalories (kcal) |
|---|---|
| 1 kJ | 0.239 kcal |
| 10 kJ | 2.3901 kcal |
| 100 kJ | 23.9006 kcal |
| 250 kJ | 59.7514 kcal |
| 500 kJ | 119.5029 kcal |
| 1,000 kJ | 239.0057 kcal |
| 2,000 kJ | 478.0115 kcal |
| 4,184 kJ | 1,000 kcal |
| 5,000 kJ | 1,195.0287 kcal |
| 8,400 kJ | 2,007.6482 kcal |
| 10,000 kJ | 2,390.0574 kcal |
| 12,000 kJ | 2,868.0688 kcal |
Questions
- How many kilojoules make a kilocalorie?
- 1 kilocalorie is 4.184 kilojoules, so 1 kilojoule = 0.239006 kilocalories.
- What is the formula to convert kilojoules to kilocalories?
- kcal = kJ × 0.239006. One kilocalorie (a food "Calorie") is defined as exactly 4.184 kilojoules.
- What is 2000 kilojoules in kilocalories?
- 2000 kilojoules is 478.0115 kilocalories.
- Is a food Calorie the same as a kilocalorie?
- Yes. The "Calories" (capital C) on food labels are kilocalories. Labels in the UK and EU usually show both kcal and kJ; 1 kcal = 4.184 kJ.