Calories to Joules
Convert cal to J. 1 calorie = 4.184 J, and 1 joule = 0.239005736138 cal.
Formula Multiply the value in calories by 4.184. Calories to Joules table
1 calorie in every unit
| Joules | 4.184 | J |
|---|---|---|
| Kilojoules | 0.004184 | kJ |
| Megajoules | 0.000004184 | MJ |
| Kilocalories | 0.001 | kcal |
| Watt-hours | 0.001162222222 | Wh |
| Kilowatt-hours | 0.000001162222 | kWh |
| British thermal units | 0.003965666831 | BTU |
| Foot-pounds | 3.08596003258 | ft·lbf |
| Electronvolts | 2.611447e+19 | eV |
Food labels write kilocalories (kcal) as "Calories". Calories here are thermochemical: 1 cal = 4.184 J.
How to convert calories to joules
Multiply the value in calories by 4.184.
For example, 10 cal = 41.84 J, and 10 J = 2.39005736138 cal.
Frequently asked questions
How many joules are in one calorie?
1 calorie = 4.184 J.
What is 10 cal in J?
10 cal = 41.84 J.
How do I convert J back to cal?
Divide the value in joules by 4.184. 1 joule = 0.239005736138 cal.
Calories to Joules table
| Calories (cal) | Joules (J) |
|---|---|
| 0.1 | 0.4184 |
| 0.5 | 2.092 |
| 1 | 4.184 |
| 2 | 8.368 |
| 3 | 12.552 |
| 4 | 16.736 |
| 5 | 20.92 |
| 6 | 25.104 |
| 7 | 29.288 |
| 8 | 33.472 |
| 9 | 37.656 |
| 10 | 41.84 |
| 15 | 62.76 |
| 20 | 83.68 |
| 25 | 104.6 |
| 30 | 125.52 |
| 50 | 209.2 |
| 75 | 313.8 |
| 100 | 418.4 |
| 250 | 1,046 |
| 500 | 2,092 |
| 1,000 | 4,184 |
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