KJ to Cal Converter
Precise kilojoules to calories conversion for nutrition and science
| Kilojoules (kJ) | Calories (cal) |
|---|---|
| 0 | 0 |
| 1 | 239.01 |
| 5 | 1195.03 |
| 10 | 2390.06 |
| 20 | 4780.11 |
| 50 | 11950.29 |
| 100 | 23900.57 |
Multiply kJ by 239.0057 to get cal. For cal to kJ, divide by 239.0057 or multiply by 0.004184.
- Enter kJ value → Result shows in cal instantly.
- Swap direction with ↔ button for cal to kJ.
- 1 kJ = 239.01 cal (small calories). Note: Nutrition often uses kcal (1 kJ ≈ 0.239 kcal).
Example: 10 kJ × 239.0057 = 2390.06 cal.
- 1 kJ
239 cal - 4.184 kJ
1000 cal - 20 kJ
4780 cal - 100 kJ
23901 cal
1 kJ equals: 1000 J, 0.239 kcal, 0.278 Wh. 1 cal equals: 4.184 J, 0.00116 Wh.
- Joules (J), kilocalories (kcal), watt-hours (Wh), British thermal units (BTU).
- Use for food labels, exercise tracking, thermodynamics.
Difference between cal and kcal?
Cal is small calorie (1 cal = 4.184 J). Kcal (food Calorie) = 1000 cal. 1 kJ = 0.239 kcal.
Why use kJ or cal in nutrition?
Food energy appears on labels in both for global standards. Track intake for diet goals.
Precise factor for kJ to cal?
1 kJ = 239.005736 cal (exact from 1 cal = 4.184 J).
XConvert.com. “Kilojoules (kJ) to calories (cal) conversion.” Accessed 2025.
Bupa Blua. “Calorie converter.” Formula: 1 Cal = 4.184 kJ. Reviewed by health professionals.
RapidTables.com. “kJ to cal converter.” Energy unit calculations.