To convert kilojoules to kilocalories, multiply by 0.2390057361.
The calculation uses 1 kJ = 0.2390057361 kcal. Results are displayed to at most 10 significant digits. Definitions can be exact while a displayed decimal is rounded. Match the displayed precision to your original measurement.
Uses the thermochemical kilocalorie, 4,184 J.
The formula
value in kcal = value in kJ × 0.2390057361
kJ- Input unit: kilojoules
kcal- Output unit: kilocalories
How to use this calculator
- Enter a value in kJ.
- Multiply by the stored conversion factor.
- Read the result in kcal; divide by the same factor to convert back.
Worked examples
Worked conversion
1 kJ × 0.2390057361 ≈ 0.2390057361 kcal.
Reverse conversion
0.2390057361 kcal ÷ 0.2390057361 ≈ 1 kJ. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 0.2390057361 kcal per kJ. Uses the thermochemical kilocalorie, 4,184 J.
Why can another converter show a slightly different answer?
Check the unit convention first (such as US versus Imperial or decimal versus binary), then compare rounding. Measurement uncertainty is separate from the unit conversion.
kJ to kcal table
| kJ | kcal (rounded) |
|---|---|
| 0 | 0 |
| 1 | 0.2390057361 |
| 2 | 0.4780114723 |
| 5 | 1.195028681 |
| 10 | 2.390057361 |
| 100 | 23.90057361 |
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