J to Cal ConverterRight in Your Browser
Convert joules (J) to calories (cal). The joule (J) is the SI energy unit — the work of pushing with one newton for one meter. The calorie (cal) is the small scientific calorie — the heat to warm one gram of water by one degree Celsius. Everything is calculated locally in your browser — no server, and it works offline.
0.239006 cal
in calories (calorie)
To convert joules to calories, multiply the joule value by 0.239006.
Switch to Cal to JJ to Cal Chart
| Joules (J) | Calories (cal) |
|---|---|
| 1 | 0.239006 |
| 2 | 0.478011 |
| 3 | 0.717017 |
| 4 | 0.956023 |
| 5 | 1.19503 |
| 10 | 2.39006 |
| 20 | 4.78011 |
| 50 | 11.9503 |
| 100 | 23.9006 |
Frequently Asked Questions
How many calories are in a joule?
One joule equals 0.239006 calories (1 J = 0.239006 cal). So to go from joules to calories, multiply the joule value by 0.239006.
What is the formula to convert joules to calories?
To convert joules to calories, multiply the joule value by 0.239006. For example, 10 J is 2.39006 cal.
What is 100 joules in calories?
100 joules — lifting an apple about 100 meters — is 23.9006 calories. The converter above works for any value, entirely in your browser.
Is the joule to calorie conversion exact?
The factor used here is the defined value: 1 J = 0.2390057361 cal. Results are rounded to six significant digits for readability, so for high-precision work use the full factor. This is the thermochemical calorie, defined as exactly 4.184 J. Note that food-label "Calories" are actually kilocalories — 1,000 of these small calories.
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