kJ to kcal – convert kilojoules to kilocalories
Convert kJ to kcal (kilojoules to kilocalories) so you can compare food labels, diet plans and gym readouts across different countries. This page opens the main energy converter with kJ → kcal pre-selected.
Open the interactive kJ → kcal converter:
Use main converter (kJ → kcal) or switch to kcal → kJOn the homepage you can quickly swap between kJ, kcal, joules and kWh, then share the exact conversion by copying the URL.
Quick reference: kJ to kcal
The exact relationship is 1 kcal = 4.184 kJ, which means: kcal = kJ ÷ 4.184. Examples:
| Energy (kJ) | Energy (kcal, approx.) |
|---|---|
| 100 kJ | 23.9 kcal |
| 250 kJ | 59.8 kcal |
| 500 kJ | 119.6 kcal |
| 1,000 kJ | 239.2 kcal |
| 2,000 kJ | 478.4 kcal |
| 8,400 kJ | 2,007 kcal (typical daily guideline) |
Why convert kilojoules to kilocalories?
Typical reasons to convert kJ to kcal include:
- UK, EU, Australian and NZ labels list kJ first but many people think in kcal.
- Comparing diet plans or calorie calculators from different countries.
- Converting energy output from sports watches or treadmills.
- Checking that nutrition-tracking apps agree with package labels.
Related energy converters on this site
The main converter uses joules (J) internally and converts in and out of kJ, kcal, Wh, kWh, BTU and more, so even unusual pairs stay consistent.