Calories to kJ
100 kcal = 418.4 kJ. Type in either box to convert both ways, in exact decimals.
The formula
100 kcal = 418.4 kJ
To convert kilocalories to kilojoules, multiply by 4.184.
Food "calories" are kilocalories, and 1 kcal is exactly 4.184 kJ. UK, EU and Australian labels show both.
Common values
| Kilocalories | Kilojoules |
|---|---|
| 1 | 4.2 |
| 50 | 209.2 |
| 100 | 418.4 |
| 200 | 836.8 |
| 250 | 1,046 |
| 300 | 1,255.2 |
| 500 | 2,092 |
| 1,000 | 4,184 |
| 2,000 | 8,368 |
| 2,500 | 10,460 |
Worked out by Figure's own converter, rounded to 1 decimal place.
How to use it
Type a number in the top box and the answer appears in the bottom one as you type; type in the bottom box to go the other way. The round button swaps the units, the unit names open every other unit, and the Every unit list shows the same amount in all of them. Sums work in the boxes too. Nothing is uploaded and there is no account.
Good for:
- Food labels that only show kJ (common in Australia)
- Diet and nutrition tracking
- Exercise and activity estimates
- Recipe nutrition
Questions
How many kilojoules is 1 kilocalorie?
1 kilocalorie is exactly 4.184 kilojoules.
Is a calorie on a food label a kilocalorie?
Yes. The Calories on food labels are kilocalories (kcal), each 4.184 kilojoules.