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Kilocalories to Kilojoules

One kilocalorie is 4.184 kilojoules. Energy units for food, electricity and physics. The "calorie" on a nutrition label is a kilocalorie — 1,000 of the calories used in physics.

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4.184

1 kilocalorie = 4.184 kilojoules · open this conversion

Formula

kilojoules = kilocalories × 4.184

A food Calorie (capital C) is a kilocalorie. The thermochemical calorie of 4.184 J is used here.

Kilocalories to Kilojoules table

KilocaloriesKilojoules
1 kcal4.184 kJ
2 kcal8.368 kJ
5 kcal20.92 kJ
10 kcal41.84 kJ
20 kcal83.68 kJ
25 kcal104.6 kJ
50 kcal209.2 kJ
100 kcal418.4 kJ
150 kcal627.6 kJ
200 kcal836.8 kJ
250 kcal1,046 kJ
300 kcal1,255.2 kJ
400 kcal1,673.6 kJ
500 kcal2,092 kJ
600 kcal2,510.4 kJ
800 kcal3,347.2 kJ
1,000 kcal4,184 kJ
1,500 kcal6,276 kJ
2,000 kcal8,368 kJ
2,500 kcal10,460 kJ
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Frequently asked questions

How many kilojoules are in a kilocalorie?
One kilocalorie is 4.184 kilojoules. kilojoules = kilocalories × 4.184.
How do I convert kilocalories to kilojoules?
Multiply the number of kilocalories by 4.184. For example, 10 kcal × 4.184 = 41.84 kJ.
What is the difference between kilocalories and kilojoules?
Kilocalorie (kcal) and Kilojoule (kJ) both measure energy. Energy units for food, electricity and physics. The "calorie" on a nutrition label is a kilocalorie — 1,000 of the calories used in physics.
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