Joules to kilocalories converter
Kilocalories (kcal)
1 joule = 0.0002390057361 kilocalories
How to convert joules to kilocalories
kcal = J × 0.000239005736138
Multiply the number of joules by 0.000239005736138 to get kilocalories. Going the other way, divide by 0.000239005736138 (or multiply by 4184).
One joule is exactly defined as 0.000239005736138 kilocalories (to 12 significant figures), and one kilocalorie is 4184 joules.
Worked examples
- Convert 5 joules: 5 × 0.000239005736138 = 0.001195028681 0.001195028681 kilocalories.
- Convert 12.5 joules: 12.5 × 0.000239005736138 = 0.002987571702 0.002987571702 kilocalories.
- Convert 250 joules: 250 × 0.000239005736138 = 0.05975143403 0.05975143403 kilocalories.
Quick-reference table
| J | kcal |
|---|---|
| 1 | 0.0002390057361 |
| 2 | 0.0004780114723 |
| 3 | 0.0007170172084 |
| 5 | 0.001195028681 |
| 10 | 0.002390057361 |
| 15 | 0.003585086042 |
| 20 | 0.004780114723 |
| 25 | 0.005975143403 |
| 50 | 0.01195028681 |
| 75 | 0.01792543021 |
| 100 | 0.02390057361 |
| 1,000 | 0.2390057361 |
| kcal | J |
|---|---|
| 1 | 4,184 |
| 2 | 8,368 |
| 3 | 12,552 |
| 5 | 20,920 |
| 10 | 41,840 |
| 15 | 62,760 |
| 20 | 83,680 |
| 25 | 104,600 |
| 50 | 209,200 |
| 75 | 313,800 |
| 100 | 418,400 |
| 1,000 | 4,184,000 |
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Frequently asked questions
How many kilocalories are in 1 joule?
1 joule equals 0.0002390057361 kilocalories.
What is the formula to convert joules to kilocalories?
Use kcal = J × 0.000239005736138. Multiply the number of joules by 0.000239005736138 to get kilocalories. Going the other way, divide by 0.000239005736138 (or multiply by 4184).
What is 100 joules in kilocalories?
100 joules is 0.02390057361 kilocalories.