Calories to Joules Converter
1 cal = 4.184 J. Type any value to convert calories to joules.
Calories to joules table
Formula: J = cal × 4.184
| Calorie (cal) | Joule (J) |
|---|---|
| 0.1 cal | 0.4184 J |
| 0.25 cal | 1.046 J |
| 0.5 cal | 2.092 J |
| 1 cal | 4.184 J |
| 2 cal | 8.368 J |
| 3 cal | 12.552 J |
| 4 cal | 16.736 J |
| 5 cal | 20.92 J |
| 6 cal | 25.104 J |
| 7 cal | 29.288 J |
| 8 cal | 33.472 J |
| 9 cal | 37.656 J |
| 10 cal | 41.84 J |
| 12 cal | 50.208 J |
| 15 cal | 62.76 J |
| 20 cal | 83.68 J |
| 25 cal | 104.6 J |
| 30 cal | 125.52 J |
| 40 cal | 167.36 J |
| 50 cal | 209.2 J |
| 60 cal | 251.04 J |
| 75 cal | 313.8 J |
| 100 cal | 418.4 J |
| 150 cal | 627.6 J |
| 200 cal | 836.8 J |
| 250 cal | 1,046 J |
| 500 cal | 2,092 J |
| 1,000 cal | 4,184 J |
How to use: Calories to Joules
- 1 Type the value in calories.
- 2 The result in joules appears at once – or type in the joules field to convert back.
- 3 Pick a common value, round to fewer decimals or swap the units with one click.
- 4 Copy the result, or open “In every unit” to see the value in all units of energy.
About this tool
Calorie (cal) is a unit of energy; 1 cal = 4.184 J. Joule (J) is a unit of energy (SI).
To convert calories to joules, multiply the value by 4.184 (J = cal × 4.184). Example: 100 cal = 418.4 J.
Calculated in your browser – nothing you type is sent anywhere.
Frequently asked questions
How do I convert calories to joules?
To convert calories to joules, multiply the value by 4.184: J = cal × 4.184. For example 100 cal = 418.4 J.
What is 1 cal in joules?
1 cal = 4.184 J. The other way round, 1 J = 0.2390057361 cal.
How exact is the result?
The converter uses the official definitions of both units and shows up to 10 significant digits; choose 0–6 decimals to round. Both units are defined exactly in terms of each other, so the factor itself is exact.
Can I convert other units of energy here?
Yes – choose any of the 12 units of energy in the From and To lists, or switch to another measurement at the top.