Convert Kilocalories per Kilogram to Kilojoules per Kilogram
1 kilocalorie per kilogram = 4.1868 kilojoules per kilogram. Multiply the number of kilocalories per kilogram by 4.1868.
1 kcal/kg = 4.1868 kJ/kg
Multiply the number of kilocalories per kilogram by 4.1868.
Results are rounded for display. Double-check values for critical work.
Popular specific energy conversions
Kilocalories per Kilogram to Kilojoules per Kilogram table
| Kilocalories per Kilogram | Kilojoules per Kilogram |
|---|---|
| 1 kcal/kg | 4.1868 kJ/kg |
| 2 kcal/kg | 8.3736 kJ/kg |
| 3 kcal/kg | 12.5604 kJ/kg |
| 4 kcal/kg | 16.7472 kJ/kg |
| 5 kcal/kg | 20.934 kJ/kg |
| 10 kcal/kg | 41.868 kJ/kg |
| 20 kcal/kg | 83.736 kJ/kg |
| 25 kcal/kg | 104.67 kJ/kg |
| 50 kcal/kg | 209.34 kJ/kg |
| 100 kcal/kg | 418.68 kJ/kg |
| 500 kcal/kg | 2,093.4 kJ/kg |
| 1000 kcal/kg | 4,186.8 kJ/kg |
Kilocalories per Kilogram to Kilojoules per Kilogram in your head
Multiply by 17, then divide by 4.
That lands within 2% of the exact value.
10 kcal/kg → 42.5 kJ/kg in your head, 41.868 kJ/kg exactly.
About these units
The kilocalorie per kilogram (kcal/kg) is a metric unit of specific energy, equal to 4,186.8 joules per kilogram.
The kilojoule per kilogram (kJ/kg) is a metric unit of specific energy, equal to 1,000 joules per kilogram.
Going the other way, 1 kilojoule per kilogram = 0.2388459 kilocalories per kilogram. Specific energy is energy per unit mass. It is how battery cells are compared, typically 150 to 300 Wh/kg for lithium-ion, and how fuels are rated, with diesel near 45 MJ/kg. Convert between the battery, fuel and food-energy units.
Frequently asked
- How many kilojoules per kilogram are in a kilocalorie per kilogram?
- 1 kilocalorie per kilogram = 4.1868 kilojoules per kilogram.
- How do you convert kilocalories per kilogram to kilojoules per kilogram?
- Multiply the number of kilocalories per kilogram by 4.1868.
- What is 10 kcal/kg in kJ/kg?
- 10 kcal/kg = 41.868 kJ/kg.