cal to J
Convert Calorie to Joule
Convert Calorie to Joule instantly with the tool above. The conversion factor is 4.184, meaning 1 calorie equals 4.184 joules. Type any value and the result updates immediately — no ads, no page reloads, no clutter.
Type a number above. The result updates instantly — no buttons, no reloads.
1 Calorie = 4.184 joules
1 Joule = 0.23900574 calories
Quick reference
Common calories converted to joules at a glance.
| cal | J |
|---|---|
| 1 | 4.184 |
| 2 | 8.368 |
| 5 | 20.92 |
| 10 | 41.84 |
| 25 | 104.6 |
| 50 | 209.2 |
| 100 | 418.4 |
| 500 | 2,092 |
| 1,000 | 4,184 |
How to convert calories to joules
To convert a value from calories to joules, multiply the calorie value by 4.184 joules. For example, 10 calories × that factor = 41.84 joules.
This calorie to joule converter runs entirely in your browser, so results appear instantly with no page reload, no advertisements and no sign-up.
Frequently asked questions
How many joules are in 1 calorie?+
1 calorie is equal to 4.184 joules.
How do you convert calories to joules?+
To convert calories to joules, multiply the calorie value by 4.184. For example, 10 calories × 4.184 = 41.84 joules.
What is the formula to convert calories to joules?+
Calorie → Joule: value × 4.184. Equivalently, 1 calorie = 4.184 joules.
Is this Calorie to Joule converter free to use?+
Yes. This calorie to joule converter is completely free, works instantly in your browser, and contains no advertisements, popups or sign-up.