Convert calorie to megajoule
Here you can quickly calculate how many megajoule fit in one calorie.
Only numbers, with a single decimal separator.
write a number and we convert instantly
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- 1 cal = 0.000004 MJ
- 1 MJ = 239005.736138 cal
Example: calorie to megajoule
- 1 calorie = 0.000004 megajoule
Calorie to megajoule conversion table
| calorie | megajoule |
|---|---|
| 1 | 0.000004 |
| 2 | 0.000008 |
| 5 | 0.000021 |
| 10 | 0.000042 |
| 20 | 0.000084 |
| 50 | 0.000209 |
| 100 | 0.000418 |
Calorie to megajoule formula
To convert calorie to megajoule, multiply by 0.000004.
1 cal = 0.000004 MJ
Example: 1 calorie = 0.000004 megajoule
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 calorie and megajoule conversion quiz
Score:
0
100 megajoule equals 4 780 000 calorie.
Correct answer: 100 megajoule = 2.39 × 10⁷ calorie.
1 calorie equals 4.18 × 10⁻⁶ megajoule.
Correct answer: 1 calorie = 4.18 × 10⁻⁶ megajoule.
100 calorie equals 4.18 × 10⁻⁵ megajoule.
Correct answer: 100 calorie = 0.000418 megajoule.
20 megajoule equals 4 780 000 calorie.
Correct answer: 20 megajoule = 4 780 000 calorie.
1 megajoule equals 47 800 calorie.
Correct answer: 1 megajoule = 239 000 calorie.