Kilocalories to kilojoules
Type a value in kcal to get it in kJ instantly.
That's 8.4× as much energy as a phone charge, while a banana is 1.05× more. That could lift a one-tonne car 42.66 m into the air.
Convert the other way: kJ to kcal
What it means
What could that energy do?
The hill climb ignores friction and assumes a 1,000 kg car. Food calories on labels are kilocalories.
The math
How to convert kcal to kJ
To convert kilocalories to kilojoules, multiply by 4.184.
Example: 100 kcal × 4.184 = 418.4 kJ.
In the other direction, 1 kJ = 0.239006 kcal.
Every unit
Your energy in every unit
Tables
kcal to kJ conversion table
| kcal | kJ |
|---|---|
| 1 kcal | 4.184 kJ |
| 2 kcal | 8.368 kJ |
| 5 kcal | 20.92 kJ |
| 10 kcal | 41.84 kJ |
| 15 kcal | 62.76 kJ |
| 20 kcal | 83.68 kJ |
| 25 kcal | 104.6 kJ |
| 50 kcal | 209.2 kJ |
| 75 kcal | 313.8 kJ |
| 100 kcal | 418.4 kJ |
| 150 kcal | 627.6 kJ |
| 200 kcal | 836.8 kJ |
| 500 kcal | 2,092 kJ |
| 1,000 kcal | 4,184 kJ |
kJ to kcal conversion table
| kJ | kcal |
|---|---|
| 1 kJ | 0.239006 kcal |
| 2 kJ | 0.478011 kcal |
| 5 kJ | 1.19503 kcal |
| 10 kJ | 2.39006 kcal |
| 15 kJ | 3.58509 kcal |
| 20 kJ | 4.78011 kcal |
| 25 kJ | 5.97514 kcal |
| 50 kJ | 11.9503 kcal |
| 75 kJ | 17.9254 kcal |
| 100 kJ | 23.9006 kcal |
| 150 kJ | 35.8509 kcal |
| 200 kJ | 47.8011 kcal |
| 500 kJ | 119.503 kcal |
| 1,000 kJ | 239.006 kcal |
Quick answers
Quick answers
- How many kJ is 1 kcal?
- 1 kcal is 4.184 kJ.
- How many kJ is 10 kcal?
- 10 kcal is 41.84 kJ.
- How many kJ is 100 kcal?
- 100 kcal is 418.4 kJ.
The units
About these units
Kilocalories (kcal)
A kilocalorie is 4,184 joules and is what nutrition labels call a Calorie. A typical adult eats about 2,000 of them a day.
Kilojoules (kJ)
A kilojoule is 1,000 joules. Food labels outside the US give energy in kilojoules, usually alongside kilocalories.
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