Calorie to Kilojoule
Convert Calorie to Kilojoule instantly. Free online engineering unit converter with exact formula, conversion table and FAQ.
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Formula
kJ = cal × 0.004184
cal = kJ × 239.006
Conversion table
| 1 cal | 0.004184 kJ |
| 5 cal | 0.02092 kJ |
| 10 cal | 0.04184 kJ |
| 20 cal | 0.08368 kJ |
| 50 cal | 0.2092 kJ |
| 100 cal | 0.4184 kJ |
| 500 cal | 2.092 kJ |
| 1000 cal | 4.184 kJ |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the Calorie (cal). A thermochemical calorie is 4.184 joules.
What is the destination unit in this conversion?
The destination unit is the Kilojoule (kJ). Kilojoule is 1000 joule units.
How do I convert Calorie to Kilojoule?
Multiply the Calorie value by 0.004184. For example, 10 cal × 0.004184 = 0.04184 kJ.
Is the Calorie to Kilojoule conversion exact?
Yes. Both units belong to the same engineering measurement family (energy), so the ratio between them is a fixed, defined value rather than a measured approximation.
Where is this conversion commonly used?
It's used whenever a value expressed in Calorie needs to be compared with, or reported in, Kilojoule, such as in engineering, scientific, or industrial calculations.
Can I convert Kilojoule back to Calorie?
Yes. Multiply the Kilojoule value by 239.006 to get Calorie.
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About this conversion
This page converts Calorie (cal) to Kilojoule (kJ) within the engineering converter.
A thermochemical calorie is 4.184 joules. Kilojoule is 1000 joule units.
The formula is kJ = cal × 0.004184, based on each unit's fixed relationship to the energy base unit.
The conversion is exact, since it relies on a fixed numerical ratio between the two units rather than a measured or approximate value.
Use the calculator above for instant results, or the table below for common Calorie values already converted to Kilojoule.