Kilocalories to Kilojoules Converter
How to convert kilocalories to kilojoules
kilojoules = kilocalories × 4.184
To convert kilocalories to kilojoules, multiply the number of kilocalories by 4.184.
1 kcal = 4.184 kJ
Examples
- A common daily reference intake: 2,000 kcal × 4.184 = 8,368 kJ
- 500 kcal × 4.184 = 2,092 kJ
Good to know
One kilocalorie is exactly 4.184 kilojoules, so 2000 kcal is 8368 kJ. Food labels round differently: the EU reference intake pairs 2000 kcal with 8400 kJ.
The kilocalorie is the food "Calorie" (capital C) shown on nutrition labels. It is based here on the thermochemical calorie, so 1 kcal is exactly 4.184 kJ.
Kilocalories to kilojoules conversion table
| Kilocalories (kcal) | Kilojoules (kJ) |
|---|---|
| 1 kcal | 4.184 kJ |
| 10 kcal | 41.84 kJ |
| 50 kcal | 209.2 kJ |
| 100 kcal | 418.4 kJ |
| 150 kcal | 627.6 kJ |
| 200 kcal | 836.8 kJ |
| 250 kcal | 1,046 kJ |
| 300 kcal | 1,255.2 kJ |
| 400 kcal | 1,673.6 kJ |
| 500 kcal | 2,092 kJ |
| 1,000 kcal | 4,184 kJ |
| 1,500 kcal | 6,276 kJ |
| 2,000 kcal | 8,368 kJ |
| 2,500 kcal | 10,460 kJ |
| 3,000 kcal | 12,552 kJ |
Unit definitions
- Kilocalorie (kcal)
- A kilocalorie is 1000 calories, exactly 4184 joules using the thermochemical calorie. It is the unit of food energy on nutrition labels.
- Kilojoule (kJ)
- A kilojoule is 1000 joules. It is the unit for food energy on nutrition labels in Australia, New Zealand and, alongside kilocalories, the European Union.