Convert joule (J) to calorie (cal).
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Calorie to Joule Converter (cal to J)
Convert calorie (cal) to joule (J).Unit Converter · Energy
Quick answer
1 calorie (cal) is equal to 4.184 joules (J). 1 joule (J) is approximately equal to 0.2390057 calories (cal).
To convert cal to J, multiply the value in calories by 4.184. For example, 10 cal = 41.84 J, and 100 cal = 418.4 J.
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How to convert calories to joules
How many joules are in a calorie? 1 calorie is 4.184 joules. This free cal to J converter and calorie to joule calculator gives the answer instantly for any value.
To convert calorie (cal) to joule (J), multiply the value in calories by 4.184.
J = cal × 4.184
- 1
Take the value in calories
For example, 25 cal.
- 2
Multiply by 4.184
25 × 4.184.
- 3
Read the answer in joules
25 cal = 104.6 J.
Calorie to Joule conversion table
Common values from 1 to 1,000 calories converted to joules.
| Calorie (cal) | Joule (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 |
| 15 cal | 62.76 J |
| 20 cal | 83.68 J |
| 25 cal | 104.6 J |
| Calorie (cal) | Joule (J) |
|---|---|
| 30 cal | 125.52 J |
| 40 cal | 167.36 J |
| 50 cal | 209.2 J |
| 60 cal | 251.04 J |
| 70 cal | 292.88 J |
| 75 cal | 313.8 J |
| 80 cal | 334.72 J |
| 90 cal | 376.56 J |
| 100 cal | 418.4 J |
| 250 cal | 1,046 J |
| 500 cal | 2,092 J |
| 1,000 cal | 4,184 J |
About calories and joules
Calorie (cal)
A calorie (cal) here is the thermochemical calorie, exactly 4.184 joules. Food "Calories" are kilocalories, a thousand times larger.
Joule (J)
The joule (J) is the SI unit of energy: the work done by a force of one newton over one meter. One watt is one joule per second.
cal to J: common questions
- How many joules are in 1 calorie?
- 1 calorie (cal) is equal to 4.184 joules (J). In short: 1 cal = 4.184 J.
- How do I convert calories to joules?
- To convert cal to J, multiply the value in calories by 4.184. For example, 5 cal = 20.92 J.
- How do I convert joules to calories?
- To convert J to cal, divide the value in joules by 4.184. Or open the Joule to Calorie converter, which does it for you.
- What is 10 cal in J, and what is 100 cal?
- 10 cal = 41.84 J, and 100 cal = 418.4 J. The table above lists more values from 1 to 1,000.
- Is this cal to J converter accurate?
- Yes. It uses the exact conversion factor and shows results to as many as 8 decimal places, so you can rely on it for study, work and everyday measuring.
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