Calories to Joules
Convert Calories to Joules with an exact factor. One calorie equals 4.184 Joules.
Result4.184
How to convert Calories to Joules
The converter above changes Calories into Joules instantly. As a reference point, one calorie corresponds to 4.184 Joules, and one joule corresponds to 0.23900574 Calories. Use the table below for common values.
Calories × 4.184 = Joules
For example, 5 Calories = 20.92 Joules.
About the units
- Calories (cal) — A calorie, 4.184 joules.
- Joules (J) — The SI unit of energy.
Calories to Joules conversion table
| Calories | Joules |
|---|---|
| 1 cal | 4.184 J |
| 2 cal | 8.368 J |
| 3 cal | 12.552 J |
| 5 cal | 20.92 J |
| 10 cal | 41.84 J |
| 20 cal | 83.68 J |
| 25 cal | 104.6 J |
| 50 cal | 209.2 J |
| 100 cal | 418.4 J |
| 250 cal | 1,046 J |
| 500 cal | 2,092 J |
| 1,000 cal | 4,184 J |
Joules to Calories conversion table
| Joules | Calories |
|---|---|
| 1 J | 0.23900574 cal |
| 2 J | 0.47801147 cal |
| 3 J | 0.71701721 cal |
| 5 J | 1.19502868 cal |
| 10 J | 2.39005736 cal |
| 20 J | 4.78011472 cal |
| 25 J | 5.9751434 cal |
| 50 J | 11.95028681 cal |
| 100 J | 23.90057361 cal |
| 250 J | 59.75143403 cal |
| 500 J | 119.50286807 cal |
| 1,000 J | 239.00573614 cal |
Frequently asked questions
How many Joules is one calorie?
One calorie is 4.184 Joules.
Are these energy conversions accurate?
Yes. They use the exact standard unit definitions, so results are accurate to the number of decimals shown.
What is the formula to convert Calories to Joules?
Multiply the number of Calories by 4.184. To convert back, multiply Joules by 0.23900574.
This tool is provided for general information only. Verify important figures independently. · Last reviewed: August 25, 2026