Skip to content
Engyna

Convert kilocalories to kilojoules

Convert kilocalories (kcal) to kilojoules (kJ). 1 kcal = 4.184 kJ, and 1 kJ = 0.239006 kcal.

100 kcal = 418.4 kJ

KCAL to kJ formula

kJ = kcal × 4.184

Multiply the number of kilocalories by 4.184.

Example: To convert 100 kcal to kilojoules: 100 × 4.184 = 418.4 kJ.

Quick answers

What is 100 kcal in kilojoules?
100 kcal = 418.4 kJ
What is 500 kcal in kilojoules?
500 kcal = 2,092 kJ
What is 2,000 kcal in kilojoules?
2,000 kcal = 8,368 kJ

KCAL to kJ conversion table

kJ to KCAL table
kilocalories (kcal)kilojoules (kJ)
1 kcal4.184 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
500 kcal2,092 kJ
1,000 kcal4,184 kJ
1,500 kcal6,276 kJ
1,800 kcal7,531.2 kJ
2,000 kcal8,368 kJ
2,500 kcal10,460 kJ
3,000 kcal12,552 kJ

Frequently asked questions

How many kilojoules are in a kilocalorie?

There are 4.184 kilojoules in a kilocalorie (1 kcal = 4.184 kJ).

How do I convert kilocalories to kilojoules?

Multiply the number of kilocalories by 4.184. To convert 100 kcal to kilojoules: 100 × 4.184 = 418.4 kJ.

Is the KCAL to kJ conversion exact?

Yes. Both units are defined exactly, so 1 kilocalorie is exactly 4.184 kilojoules. Results on this page are rounded to six significant digits; pick more decimals in the converter if you need them.

What is 100 kcal in kilojoules?

100 kcal = 418.4 kJ.

How do I convert kilojoules back to kilocalories?

Use the reverse relationship: 1 kJ = 0.239006 kcal. The kJ to KCAL page has a converter and a full table.

More energy conversions

All unit conversions