ENERGY CONVERSION
Kilocalorie to Kilojoule.
Convert kilocalorie (kcal) to kilojoule (kJ), with the math explained.
1 kcal = 4.184 kJ
THE MATH, MADE SIMPLE
How to convert kilocalorie to kilojoule
Multiply your kilocalorie value by 4.184 to get the equivalent in kilojoule. Both units are normalized through the joule.
kJ = kcal × 4.18410 kcal = 41.84 kJ
Result rounded to 12 significant digits. Change the precision in the calculator to suit your task.QUICK REFERENCE
kcal to kJ conversion table
| Kilocalorie (kcal) | Kilojoule (kJ) |
|---|---|
| 1 kcal | 4.184 kJ |
| 2 kcal | 8.368 kJ |
| 5 kcal | 20.92 kJ |
| 10 kcal | 41.84 kJ |
| 20 kcal | 83.68 kJ |
| 50 kcal | 209.2 kJ |
| 100 kcal | 418.4 kJ |
| 500 kcal | 2,092 kJ |
| 1,000 kcal | 4,184 kJ |
About the kilocalorie
The kilocalorie (kcal) is a unit of energy. One kilocalorie equals 4,184 joule (base unit) in this calculator.
All kilocalorie conversionsAbout the kilojoule
The kilojoule (kJ) is a unit of energy. One kilojoule equals 1,000 joule (base unit) in this calculator.
All kilojoule conversionsCommon questions
What is 1 kcal in kJ?
One kilocalorie equals 4.184 kJ. Use the formula above for other values.
Why might another calculator show a different last digit?
Calculators may round at different stages or use different unit conventions. We keep full JavaScript numeric precision during calculation and round only for display. Choose up to 15 significant digits. Check US versus UK units and the notes for this category.
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