Convert kilocalorie to kilojoule
Here you can quickly calculate how many kilojoule fit in one kilocalorie.
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- 1 kcal = 4.184 kJ
- 1 kJ = 0.239006 kcal
Example: kilocalorie to kilojoule
- 1 kilocalorie = 4.184 kilojoule
Kilocalorie to kilojoule conversion table
| kilocalorie | kilojoule |
|---|---|
| 1 | 4.184 |
| 2 | 8.368 |
| 5 | 20.92 |
| 10 | 41.84 |
| 20 | 83.68 |
| 50 | 209.2 |
| 100 | 418.4 |
Kilocalorie to kilojoule formula
To convert kilocalorie to kilojoule, multiply by 4.184.
1 kcal = 4.184 kJ
Example: 1 kilocalorie = 4.184 kilojoule
Common energy conversion mistakes
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Food 'calories' are actually kilocalories: 1 kcal = 1,000 cal. A '500-calorie' meal therefore contains 500 kcal, half a million small calories. Labels write the same thing as 'kcal' or as 'Cal' with a capital C.
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The relationship is exact: 1 kWh = 3.6 MJ (3,600 kJ, because an hour has 3,600 seconds). The common slip is dividing when you should multiply: 10 kWh is 36 MJ, not 2.8. Remember the direction: kWh → MJ means times 3.6.
Quick kilocalorie and kilojoule conversion quiz
Score:
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8.4 kilojoule equals 2.01 kilocalorie.
Correct answer: 8.4 kilojoule = 2.01 kilocalorie.
16.6 kilocalorie equals 76.4 kilojoule.
Correct answer: 16.6 kilocalorie = 69.5 kilojoule.
90 kilocalorie equals 377 kilojoule.
Correct answer: 90 kilocalorie = 377 kilojoule.
78 kilojoule equals 18.6 kilocalorie.
Correct answer: 78 kilojoule = 18.6 kilocalorie.