Energy & Power calculator
Calories to Kilojoules Converter
Convert food calories (cal) to kilojoules (kj) with the exact energy formula, worked examples, and a common-values table.
Exact conversion
Food Calories to kilojoules formula
kj = cal × 4.184
1 cal equals 4.184 kj. 10 cal equals 41.84 kj.
About these units
- cal
- Food calorie (cal) is a energy unit used in this converter.
- kj
- Kilojoule (kj) is a energy unit used in this converter.
Common cal to kj values
| cal | kj |
|---|---|
| 1 cal | 4.184 kj |
| 5 cal | 20.92 kj |
| 10 cal | 41.84 kj |
| 25 cal | 104.6 kj |
| 50 cal | 209.2 kj |
| 100 cal | 418.4 kj |
Formula
Food Calories to kilojoules formula
kj = cal × 4.184
1 cal equals 4.184 kj. 10 cal equals 41.84 kj.
FAQs
How do I convert food calories to kilojoules?+
Use this formula: kj = cal × 4.184. Enter the cal value and the calculator applies the relationship immediately.
How many kj are in 1 cal?+
1 cal equals 4.184 kj.
What is 10 cal in kj?+
10 cal equals 41.84 kj. The displayed result may be rounded, while the calculator keeps full precision internally.
Can I convert kilojoules back to food calories?+
Yes. Use Swap in the converter to reverse the units and calculate kj to cal.
How does the Calories to Kilojoules Converter calculate the result?+
It uses the Food Calories to kilojoules formula: kj = cal × 4.184. 1 cal equals 4.184 kj. 10 cal equals 41.84 kj.
What information do I need to use the Calories to Kilojoules Converter?+
Convert food calories (cal) to kilojoules (kj) with the exact energy formula, worked examples, and a common-values table.
Energy & Power guide
How to use the Calories to Kilojoules Converter
Convert food calories (cal) to kilojoules (kj) with the exact energy formula, worked examples, and a common-values table. The page also explains the food Calories to kilojoules formula and shows a practical example: 1 cal equals 4.184 kj. 10 cal equals 41.84 kj.
- 1
Enter your details
Enter the source value, then choose the units or values you want to convert.
- 2
Check the calculation
Review the result alongside the food Calories to kilojoules formula: kj = cal × 4.184.
- 3
Compare scenarios
Change one or more inputs to see how they affect the calories to Kilojoules Converter result before you use the estimate.
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