Kilojoules to Kilocalories Converter
1 kilojoule = 0.239006 kilocalories.
Enter a value
Result
1 kilojoule =
0.239006 kcal
1 kJ × 0.239006 = 0.239006 kcal
1 kcal = 4.184 kJ · 1 kWh = 3,600 kJ
The working
- 1. Convert 1 kJ to joules: 1 × 1,000 = 1,000.
- 2. Convert to kcal: 1,000 ÷ 4,184 = 0.239006.
1 kJ in every unit
Everyday energy
- A banana
- ≈ 400 kJ (95 kcal)
- Boiling a kettle
- ≈ 0.1 kWh
- A litre of petrol
- ≈ 34 MJ
Conversion table
Kilojoules to Kilocalories
| Kilojoules | Kilocalories |
|---|---|
| 100 | 23.901 |
| 250 | 59.751 |
| 500 | 119.5 |
| 840 | 200.76 |
| 1,000 | 239.01 |
| 2,000 | 478.01 |
| 4,000 | 956.02 |
| 8,700 | 2,079.3 |
| 10,000 | 2,390.1 |
Kilocalories to Kilojoules
| Kilocalories | Kilojoules |
|---|---|
| 100 | 418.4 |
| 250 | 1,046 |
| 500 | 2,092 |
| 840 | 3,514.6 |
| 1,000 | 4,184 |
| 2,000 | 8,368 |
| 4,000 | 16,736 |
| 8,700 | 36,401 |
| 10,000 | 41,840 |
Formula and worked example
kilocalories = kilojoules × 0.2390057361 (1 kilocalorie is 4.184 kJ (thermochemical)).
Convert 1,000 kilojoules to kilocalories: 1,000 × 0.23900574 = 239.006 kcal.
When you need this
Australian and New Zealand food labels lead with kilojoules. Divide by 4.184 to get the kilocalories (Calories) most diet apps use.
Questions people ask
How many kilocalories are in a kilojoule?
One kilojoule is 0.23900574 kilocalories. 1 kilocalorie is 4.184 kJ (thermochemical).
How do I convert kilojoules to kilocalories?
Multiply the number of kilojoules by 0.23900574, or divide by 4.184.
What is 1,000 kJ in kcal?
1,000 kilojoules is 239.006 kilocalories.
How do I convert kilocalories back to kilojoules?
Multiply by 4.184: one kilocalorie is 4.184 kilojoules.
Related conversions
How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it. Source: NIST Special Publication 811, Guide for the Use of the International System of Units.
Spotted a mistake? Tell us and we'll check it. How we check our calculators