kJ to kcal Converter - Kilojoule to Kilocalorie
Kilojoule (kJ) to Kilocalorie (kcal)
Direct answer
1 kJ = 0.239005736138 kcal
kcal = kJ × 0.239005736138
Converter
Conversion formula
kcal = kJ × 0.239005736138
kJ = kcal × 4.184
Example: 10 kJ = 10 × 0.239005736138 = 2.39005736138 kcal.
Common conversion table
| kJ | kcal |
|---|---|
| 1 kJ | 0.239005736138 kcal |
| 2 kJ | 0.478011472275 kcal |
| 5 kJ | 1.19502868069 kcal |
| 10 kJ | 2.39005736138 kcal |
| 20 kJ | 4.78011472275 kcal |
| 50 kJ | 11.9502868069 kcal |
| 100 kJ | 23.9005736138 kcal |
| 1,000 kJ | 239.005736138 kcal |
Conversion derivation
Express both kJ and kcal in the same base unit J (joule), then cancel the shared base unit.
- 1
Rewrite kJ in the base unit
- 2
Rewrite kcal in the base unit
- 3
Forward conversion
- 4
Reverse conversion
AI explanation for this conversion
This pre-generated explanation is schema-checked. Numeric results still come from the page formula and calculator.
Why the kilojoule to kilocalorie conversion factor holds
The conversion factor is derived by expressing both units in the same base unit of joules and then canceling the base unit.
Definition
A kilojoule (kJ) is 1,000 joules. A kilocalorie (kcal) is defined as 4,184 joules.
Principle
To find how many kilocalories are in one kilojoule, you divide the joule value of the kilojoule by the joule value of the kilocalorie, which gives 1,000 / 4,184 = 0.239005736138. The reverse factor is 4,184 / 1,000 = 4.184.
Assumptions
- The definition of a kilocalorie as exactly 4,184 joules is used.
- The definition of a kilojoule as exactly 1,000 joules is used.
Cautions
- The provided conversion factors are exact based on these definitions.
- Rounding the result to the precision required by your calculation is necessary.
- The explanation does not introduce or recalculate any values beyond the supplied context.
FAQ
How many kcal are in 1 kJ?
1 kJ = 0.239005736138 kcal.
How many kcal are in 10 kJ?
10 kJ = 2.39005736138 kcal.
How many kcal are in 100 kJ?
100 kJ = 23.9005736138 kcal.
What is the formula to convert kJ to kcal?
Use kcal = kJ × 0.239005736138.
How many kJ are in 1 kcal?
1 kcal = 4.184 kJ.
What should I check when converting kJ to kcal?
Use the conversion factor and round the result to the precision required by your calculation.