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100 Calories to Kilojoules

Answer
100 cal = 0.4184 kJ
kilojoules = calories × 0.004184
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0.4184

100 calories = 0.4184 kilojoules · open this conversion

How the answer is worked out

One calorie is 0.004184 kilojoules, so converting is a single multiplication:

100 cal × 0.004184 = 0.4184 kJ

Conversion table around 100 cal

CaloriesKilojoules
1 cal0.004184 kJ
2 cal0.008368 kJ
5 cal0.02092 kJ
10 cal0.04184 kJ
20 cal0.08368 kJ
25 cal0.1046 kJ
50 cal0.2092 kJ
100 cal0.4184 kJ
150 cal0.6276 kJ
200 cal0.8368 kJ
250 cal1.046 kJ
300 cal1.2552 kJ
400 cal1.6736 kJ
500 cal2.092 kJ
600 cal2.5104 kJ
800 cal3.3472 kJ
1,000 cal4.184 kJ
1,500 cal6.276 kJ
2,000 cal8.368 kJ
2,500 cal10.46 kJ
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Frequently asked questions

How many kilojoules is 100 calories?
100 calories is 0.4184 kilojoules. The conversion multiplies by 0.004184, so 100 × 0.004184 = 0.4184.
What is the formula to convert calories to kilojoules?
kilojoules = calories × 0.004184. One calorie is 0.004184 kilojoules.
How do I convert 100 kilojoules back to calories?
Use the reverse conversion: 100 kilojoules is 23,900.57 calories.
Is this conversion exact?
The underlying factor is exact as defined by the SI and the 1959 international agreements. The figure shown is rounded to seven significant digits for readability.
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