Energy
joules to calories Converter
1 J = 0.23885 cal. Enter any value and the result updates instantly.
Convert
Accuracy and rounding
Use energy units for accumulated work or heat. Do not confuse kWh with kW, which is power rather than energy.
Energy units share a fixed joule reference. Food Calories are kilocalories, while a small calorie is 4.1868 joules.
For billing, nutrition, or engineering, match the precision of the original calories data and keep the energy/power distinction explicit.
How to convert joules to calories
- Type the joules value in the calculator.
- Keep joules selected as the from unit and calories selected as the to unit.
- Use the instant result, or copy it with the copy button.
joules to calories chart
| joules | calories |
|---|---|
| 1 J | 0.23885 cal |
| 10 J | 2.3885 cal |
| 100 J | 23.8846 cal |
| 1,000 J | 238.85 cal |
| 10,000 J | 2,388.46 cal |
Formula
cal = J x 0.238845896627
Example: 1 J = 0.23885 cal.
Source
Energy factors from NIST SI conversion tables, using the joule as the shared reference unit.
Common questions
How do I convert joules to calories?
Enter the joules value in the converter, or multiply by the factor shown in the formula. 1 J = 0.23885 cal.
What should I watch out for?
Do not confuse energy with power: kWh is accumulated energy, while kW is a rate of energy transfer.
Where does this energy conversion come from?
Energy factors from NIST SI conversion tables, using the joule as the shared reference unit. ConverterBase uses stable definitions and fixed conversion factors, not live or rounded market data.