Kilojoules to Kilocalories Converter
Type a value in kilojoules to see it in kilocalories. It works both ways: type in the kilocalories box to convert back.
Formula
To convert kilojoules to kilocalories, divide by 4.184 (the same as multiplying by 0.2390057361).
1 kJ = 0.239005736138 kcal and 1 kcal = 4.184 kJ.
Kilojoules to kilocalories table
| Kilojoules | Kilocalories |
|---|---|
| 100 kJ | 23.90057 kcal |
| 250 kJ | 59.75143 kcal |
| 500 kJ | 119.5029 kcal |
| 1,000 kJ | 239.0057 kcal |
| 2,000 kJ | 478.0115 kcal |
| 4,184 kJ | 1,000 kcal |
| 8,400 kJ | 2,007.648 kcal |
Worked examples
250 kJ in kilocalories
250 kJ
59.75143 kcal
250 × 0.2390057361 = 59.75143403
1,000 kJ in kilocalories
1,000 kJ
239.0057 kcal
1,000 × 0.2390057361 = 239.0057361
4,184 kJ in kilocalories
4,184 kJ
1,000 kcal
4,184 × 0.2390057361 = 1,000
About Kilojoules to Kilocalories Converter
This converter turns kilojoules into kilocalories as you type, and works the other way too: type in the kilocalories box to convert back. To convert kilojoules to kilocalories, divide by 4.184 (the same as multiplying by 0.2390057361). For example, 250 kJ is 59.75143 kcal, and 1,000 kJ is 239.0057 kcal.
Energy appears on food labels, electricity bills and heating ratings, each in its own unit, so converting between kilojoules, kilocalories, kilowatt hours and BTU helps compare them. Both units have exact definitions, so the converter gives an exact result, rounded only for display. Use the table below for common values, or set the decimal places to round the answer for a form or a label.
How to use Kilojoules to Kilocalories Converter
- Type the amount in kilojoules in the first box.
- Read the answer in kilocalories in the second box and in the result line below.
- To convert the other way, type in the kilocalories box instead, or use the swap button to open the kilocalories to kilojoules page.
- Choose a number of decimal places if you need a rounded figure, then copy the result line.
Common uses
- Comparing food energy on labels
- Working out heating or electricity costs
- Comparing boiler, heater or air conditioner ratings
- Science and engineering homework
Frequently asked questions
How many kilocalories are in one kilojoule?
There are 0.2390057361 kilocalories in one kilojoule. This figure is exact, because both units have fixed definitions.
How do I convert kilojoules to kilocalories?
To convert kilojoules to kilocalories, divide by 4.184 (the same as multiplying by 0.2390057361). For example, 4,184 kJ is 1,000 kcal.
How do I convert kilocalories to kilojoules?
Going the other way, multiply by 4.184. The kilocalories to kilojoules converter does this for you.
What is 1,000 kJ in kilocalories?
1,000 kJ is 239.0057 kcal.
Are calories on food labels the same as calories in science?
No. The calories on food labels are kilocalories, each 1,000 small calories. A label showing 250 kcal means 250,000 small calories, or about 1,046 kilojoules.