Converters
12
Joules to Calories Converter
Convert joules to calories instantly with the formula, worked examples, rounding guidance, and related energy conversions.
Units
85
Mode
Live
Pair-specific conversion guide
Joule to Calorie formula
Use this Joule to Calorie page for direct energy conversions. The calculator keeps the exact J to cal relationship on the page, so the result, formula, and examples all describe this specific pair.
Formula model
1 J = 0.239005736138 cal
1 Joule equals
Quick factor: 1 J = 0.239005736138 cal.
The current calculator value is 1 J, which equals 0.239005736138 cal.
Use the conversion table to compare 1 J with the other units in the same category.
Energy units can describe electricity, heat, or nutrition, so retain the unit symbol with every result.
Precision and rounding
The calculation uses the catalog's fixed conversion factors between J and cal. Full decimal precision is kept for the calculation; only the displayed value is rounded for readability.
Reference: NIST conversion factorsEnergy
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Calories to Joules Converter
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Conversion table
1 Joule equals
| Unit | Value |
|---|---|
| Kilojoule kJ | 0.001 |
| Calorie cal | 0.239005736138 |
| Kilocalorie kcal | 0.000239005736138 |
| Watt-hour Wh | 0.000277777777778 |
| Kilowatt-hour kWh | 2.77777777778E-07 |
| British thermal unit BTU | 0.000947817120313 |
FAQ
Joule to Calorie questions
How do you convert Joule to Calorie?
Use the formula 1 J = 0.239005736138 cal. As a quick check, 1 J equals 0.239005736138 cal.
Is the Joule to Calorie conversion exact?
This page uses fixed constants from the Converter Science catalog. Displayed results are rounded only to keep the page readable.