Joules to calories
Type a value in J to get it in cal instantly.
That's 100× as much energy as one heartbeat, while an AA battery is 94× more. That could lift a one-tonne car 0.0102 m into the air.
Convert the other way: cal to J
What it means
What could that energy do?
The hill climb ignores friction and assumes a 1,000 kg car. Food calories on labels are kilocalories.
The math
How to convert J to cal
To convert joules to calories, multiply by 0.239006.
Example: 100 J × 0.239006 = 23.9006 cal.
In the other direction, 1 cal = 4.184 J.
Every unit
Your energy in every unit
Tables
J to cal conversion table
| J | cal |
|---|---|
| 1 J | 0.239006 cal |
| 2 J | 0.478011 cal |
| 5 J | 1.19503 cal |
| 10 J | 2.39006 cal |
| 15 J | 3.58509 cal |
| 20 J | 4.78011 cal |
| 25 J | 5.97514 cal |
| 50 J | 11.9503 cal |
| 75 J | 17.9254 cal |
| 100 J | 23.9006 cal |
| 150 J | 35.8509 cal |
| 200 J | 47.8011 cal |
| 500 J | 119.503 cal |
| 1,000 J | 239.006 cal |
cal to J conversion table
| cal | J |
|---|---|
| 1 cal | 4.184 J |
| 2 cal | 8.368 J |
| 5 cal | 20.92 J |
| 10 cal | 41.84 J |
| 15 cal | 62.76 J |
| 20 cal | 83.68 J |
| 25 cal | 104.6 J |
| 50 cal | 209.2 J |
| 75 cal | 313.8 J |
| 100 cal | 418.4 J |
| 150 cal | 627.6 J |
| 200 cal | 836.8 J |
| 500 cal | 2,092 J |
| 1,000 cal | 4,184 J |
Quick answers
Quick answers
- How many cal is 1 J?
- 1 J is 0.239006 cal.
- How many cal is 10 J?
- 10 J is 2.39006 cal.
- How many cal is 100 J?
- 100 J is 23.9006 cal.
The units
About these units
Joules (J)
The joule is the SI unit of energy: the work done pushing with one newton over one meter. Lifting an apple a meter takes about one joule.
Calories (cal)
One small calorie is 4.184 joules, the heat that raises a gram of water by one degree. Food labels use the kilocalorie, a thousand of these.
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