Kilojoules (kJ) to Kilocalories (kcal) Conversion
Kilojoules
The kilojoule (kJ) is a unit of energy equal to exactly 1,000 joules. It is the standard unit for expressing food energy in most countries outside the United States, where food labels display energy in both kilojoules and kilocalories (kcal). One kilocalorie equals exactly 4.184 kilojoules. In thermodynamics and chemistry, reaction enthalpies and bond energies are commonly tabulated in kilojoules per mole (kJ/mol).
Kilocalories
The kilocalorie (kcal), commonly called a "Calorie" (capital C) in nutritional contexts, is a unit of energy equal to exactly 4,184 joules. It represents the energy needed to raise 1 kg of water by 1 °C. In nutrition, all food energy values are expressed in kcal per gram: carbohydrates and protein provide 4 kcal/g; fat provides 9 kcal/g; alcohol provides 7 kcal/g. An average adult requires approximately 2,000–2,500 kcal per day to maintain body weight.
| Kilojoules (kJ) | Kilocalories (kcal) |
|---|---|
| 0.1 kJ | 0.0239 kcal |
| 1 kJ | 0.239 kcal |
| 2 kJ | 0.478 kcal |
| 3 kJ | 0.717 kcal |
| 5 kJ | 1.195 kcal |
| 10 kJ | 2.3901 kcal |
| 20 kJ | 4.7801 kcal |
| 30 kJ | 7.1702 kcal |
| 50 kJ | 11.9503 kcal |
| 100 kJ | 23.9006 kcal |
| 1000 kJ | 239.0057 kcal |
Frequently Asked Questions (FAQ)
How many kilocalories are in 1 kilojoules?
1 kilojoules (kJ) is exactly 0.239006 kilocalories (kcal).
How do I convert kilojoules to kilocalories?
Multiply the value in kilojoules by 0.239006 to get the result in kilocalories. Or use the converter above — type any number and see the result instantly.