Joule to Calorie Converter
Convert joules to calories with this free energy converter. The exact relationship used on this page is 1 joule = 0.239005736138 calories. Type any number — the result updates instantly, works on phones and desktops, and is ready to copy into homework, a spec sheet, or a shopping list.
Formula: Calorie = Joule × 0.239005736138
How to convert joules to calories
- Enter the value in joules in the converter.
- Read the equivalent amount in calories.
- Use the swap link if you need calorie to joule instead.
- Check the table for common values without typing.
Worked examples
- 1 J = 0.2390057361 cal
- 5 J = 1.195028681 cal
- 10 J = 2.390057361 cal
- 25 J = 5.975143403 cal
Conversion table
Common joules values converted to calories.
| J | cal |
|---|---|
| 1 | 0.2390057361 |
| 2 | 0.4780114723 |
| 3 | 0.7170172084 |
| 4 | 0.9560229446 |
| 5 | 1.195028681 |
| 6 | 1.434034417 |
| 7 | 1.673040153 |
| 8 | 1.912045889 |
| 9 | 2.151051625 |
| 10 | 2.390057361 |
| 20 | 4.780114723 |
| 50 | 11.95028681 |
| 100 | 23.90057361 |
| 250 | 59.75143403 |
| 500 | 119.5028681 |
| 1,000 | 239.0057361 |
About this conversion
Joule (J) and Calorie (cal) are both energy units. Energy converters connect food labels (kcal), electricity bills (kWh), physics (joules), and heating (BTU). Bookmark this URL when you convert joules to calories often, then explore related pairs in the same category if you need a different target unit.
Need the other direction? Open the calorie to joule converter.
FAQ
How many calories are in 1 joule?+
1 joule equals 0.239005736138 calories.
What is the formula to convert joules to calories?+
Calorie = Joule × 0.239005736138
How do I convert joules to calories by hand?+
Multiply the joule value by 0.239005736138. Example: 10 joules × 0.239005736138 = 2.39005736138 calories.
Is this J to cal converter accurate?+
Yes. Linear conversions use internationally agreed factors relative to SI. Temperature and inverse fuel units use the standard offset or reciprocal formulas, not a guessed scale factor.