Convert kilocalorie (kcal) to joule (J).
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Joule to Kilocalorie Converter (J to kcal)
Convert joule (J) to kilocalorie (kcal).Unit Converter · Energy
Quick answer
1 joule (J) is approximately equal to 0.00023901 kilocalories (kcal). 1 kilocalorie (kcal) is equal to 4,184 joules (J).
To convert J to kcal, multiply the value in joules by 0.0002390057 (or divide by 4,184). For example, 10 J = 0.00239006 kcal, and 100 J = 0.02390057 kcal.
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Quick reference — joule to kilocalorie
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How to convert joules to kilocalories
How many kilocalories are in a joule? 1 joule is about 0.00023901 kilocalories. This free J to kcal converter and joule to kilocalorie calculator gives the answer instantly for any value.
To convert joule (J) to kilocalorie (kcal), multiply the value in joules by 0.0002390057, or divide it by 4,184.
kcal = J × 0.0002390057
- 1
Take the value in joules
For example, 25 J.
- 2
Multiply by 0.0002390057
25 × 0.0002390057.
- 3
Read the answer in kilocalories
25 J = 0.00597514 kcal.
Joule to Kilocalorie conversion table
Common values from 1 to 1,000 joules converted to kilocalories.
| Joule (J) | Kilocalorie (kcal) |
|---|---|
| 1 J | 0.00023901 kcal |
| 2 J | 0.00047801 kcal |
| 3 J | 0.00071702 kcal |
| 4 J | 0.00095602 kcal |
| 5 J | 0.00119503 kcal |
| 6 J | 0.00143403 kcal |
| 7 J | 0.00167304 kcal |
| 8 J | 0.00191205 kcal |
| 9 J | 0.00215105 kcal |
| 10 J | 0.00239006 kcal |
| 15 J | 0.00358509 kcal |
| 20 J | 0.00478011 kcal |
| 25 J | 0.00597514 kcal |
| Joule (J) | Kilocalorie (kcal) |
|---|---|
| 30 J | 0.00717017 kcal |
| 40 J | 0.00956023 kcal |
| 50 J | 0.01195029 kcal |
| 60 J | 0.01434034 kcal |
| 70 J | 0.0167304 kcal |
| 75 J | 0.01792543 kcal |
| 80 J | 0.01912046 kcal |
| 90 J | 0.02151052 kcal |
| 100 J | 0.02390057 kcal |
| 250 J | 0.05975143 kcal |
| 500 J | 0.11950287 kcal |
| 1,000 J | 0.23900574 kcal |
About joules and kilocalories
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.
Kilocalorie (kcal)
A kilocalorie (kcal) is 1,000 calories, or 4,184 joules. It is the "Calorie" used on food labels and in diet and fitness tracking.
J to kcal: common questions
- How many kilocalories are in 1 joule?
- 1 joule (J) is approximately equal to 0.00023901 kilocalories (kcal). In short: 1 J ≈ 0.00023901 kcal.
- How do I convert joules to kilocalories?
- To convert J to kcal, multiply the value in joules by 0.0002390057 (or divide by 4,184). For example, 5 J = 0.00119503 kcal.
- How do I convert kilocalories to joules?
- To convert kcal to J, multiply the value in kilocalories by 4,184. Or open the Kilocalorie to Joule converter, which does it for you.
- What is 10 J in kcal, and what is 100 J?
- 10 J = 0.00239006 kcal, and 100 J = 0.02390057 kcal. The table above lists more values from 1 to 1,000.
- Is this J to kcal 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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