Calories to kilojoules (kcal to kJ)
To convert calories to kilojoules (kcal to kJ), multiply by 4.184. 1 calorie equals 4.184 kJ, about 42% of an AA battery.
1 calorie equals
4.184kJ
1 kcal = 4.184 kJ · 1 kJ = 0.23901 kcal
Reference table
| calories | kilojoules |
|---|
| 1 calorie | 4.184 kJ |
| 2 calories | 8.368 kJ |
| 5 calories | 20.92 kJ |
| 10 calories | 41.84 kJ |
| 25 calories | 104.6 kJ |
| 50 calories | 209.2 kJ |
| 100 calories | 418.4 kJ |
| 250 calories | 1,046 kJ |
| 500 calories | 2,092 kJ |
| 1000 calories | 4,184 kJ |
Show the working
1. Convert to the base unit (MJ):
1 kcal × 4,184 = 4,184 MJ
2. Convert from MJ to kJ:
4,184 MJ ÷ 1,000 = 4.184 kJ
Common questions
- How many kilojoules is 1 calorie?
- 1 calorie equals 4.184 kJ, about 42% of an AA battery.
- How many calories is 1 kilojoule?
- 1 kilojoule equals 0.23901 kcal, about 10% of an AA battery.
Convert any other amount →