Joule to Kilocalorie Converter
Convert joules to kilocalories with this free energy converter. The exact relationship used on this page is 1 joule = 0.000239005736138 kilocalories. 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: Kilocalorie = Joule × 0.000239005736138
How to convert joules to kilocalories
- Enter the value in joules in the converter.
- Read the equivalent amount in kilocalories.
- Use the swap link if you need kilocalorie to joule instead.
- Check the table for common values without typing.
Worked examples
- 1 J = 0.0002390057361 kcal
- 5 J = 0.001195028681 kcal
- 10 J = 0.002390057361 kcal
- 25 J = 0.005975143403 kcal
Conversion table
Common joules values converted to kilocalories.
| J | kcal |
|---|---|
| 1 | 0.0002390057361 |
| 2 | 0.0004780114723 |
| 3 | 0.0007170172084 |
| 4 | 0.0009560229446 |
| 5 | 0.001195028681 |
| 6 | 0.001434034417 |
| 7 | 0.001673040153 |
| 8 | 0.001912045889 |
| 9 | 0.002151051625 |
| 10 | 0.002390057361 |
| 20 | 0.004780114723 |
| 50 | 0.01195028681 |
| 100 | 0.02390057361 |
| 250 | 0.05975143403 |
| 500 | 0.1195028681 |
| 1,000 | 0.2390057361 |
About this conversion
Joule (J) and Kilocalorie (kcal) 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 kilocalories often, then explore related pairs in the same category if you need a different target unit.
Need the other direction? Open the kilocalorie to joule converter.
FAQ
How many kilocalories are in 1 joule?+
1 joule equals 0.000239005736138 kilocalories.
What is the formula to convert joules to kilocalories?+
Kilocalorie = Joule × 0.000239005736138
How do I convert joules to kilocalories by hand?+
Multiply the joule value by 0.000239005736138. Example: 10 joules × 0.000239005736138 = 0.00239005736138 kilocalories.
Is this J to kcal 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.