Convert calorie to kilojoule
Here you can quickly calculate how many kilojoule fit in one calorie.
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- 1 cal = 0.004184 kJ
- 1 kJ = 239.005736 cal
Conversion from calorie to kilojoule example
- 1 calorie = 0.004184 kilojoule
Calorie to kilojoule conversion table
| calorie | kilojoule |
|---|---|
| 1 | 0.004184 |
| 2 | 0.008368 |
| 5 | 0.02092 |
| 10 | 0.04184 |
| 20 | 0.08368 |
| 50 | 0.2092 |
| 100 | 0.4184 |
Formula to convert calorie to kilojoule
To convert calorie to kilojoule, multiply by 0.004184.
1 cal = 0.004184 kJ
Example: 1 calorie = 0.004184 kilojoule
Common 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 calorie to/from kilojoule conversion quiz
Score:
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11.8 kilojoule equals 4.23e+3 calorie.
Correct answer: 11.8 kilojoule = 2.82e+3 calorie.
213 kilojoule equals 3.05e+4 calorie.
Correct answer: 213 kilojoule = 5.09e+4 calorie.
73 kilojoule equals 1.74e+4 calorie.
Correct answer: 73 kilojoule = 1.74e+4 calorie.
28 calorie equals 0.117 kilojoule.
Correct answer: 28 calorie = 0.117 kilojoule.