Formula.calories = joules ÷ 4.184.
Relationship.1 J = 0.239006 cal.
Worked example. 1,000 J = 239.01 cal.
Joules to Calories Converter.
1 J = 0.239006 cal, so 1,000 J = 239.01 cal. Type any value below to convert joules to calories instantly.
Quick
J
Copied ✓ cal
Copied ✓ Reference Table
| J | kJ | cal | kcal | Wh | kWh | BTU | eV |
|---|---|---|---|---|---|---|---|
| 1 | 0.001 | 0.2390057361 | 0.0002390057 | 0.0002777778 | 2.777778e-7 | 0.0009478134 | 6.242197e+18 |
| 10 | 0.01 | 2.390057 | 0.0023900574 | 0.0027777778 | 0.0000027778 | 0.0094781339 | 6.242197e+19 |
| 100 | 0.1 | 23.900574 | 0.0239005736 | 0.0277777778 | 0.0000277778 | 0.0947813394 | 6.242197e+20 |
| 1000 | 1 | 239.005736 | 0.2390057361 | 0.2777777778 | 0.0002777778 | 0.9478133945 | 6.242197e+21 |
| 10000 | 10 | 2390.0574 | 2.390057 | 2.777778 | 0.0027777778 | 9.478134 | 6.242197e+22 |
| 100000 | 100 | 23900.5736 | 23.900574 | 27.777778 | 0.0277777778 | 94.781339 | 6.242197e+23 |
| 1000000 | 1000 | 239005.7361 | 239.005736 | 277.777778 | 0.2777777778 | 947.813394 | 6.242197e+24 |
How to convert joules to calories
joules to calories conversion table
| J | cal |
|---|---|
| 1 | 0.2390057361 |
| 5 | 1.195029 |
| 10 | 2.390057 |
| 25 | 5.975143 |
| 50 | 11.950287 |
| 100 | 23.900574 |
| 250 | 59.751434 |
| 418.4 | 100 |
| 500 | 119.502868 |
| 750 | 179.254302 |
| 1000 | 239.005736 |
| 2000 | 478.011472 |
| 2500 | 597.51434 |
| 4184 | 1000 |
| 5000 | 1195.0287 |
| 7500 | 1792.543 |
| 10000 | 2390.0574 |
| 25000 | 5975.1434 |
| 41840 | 10000 |
| 50000 | 11950.2868 |
| 100000 | 23900.5736 |
| 250000 | 59751.434 |
| 418400 | 100000 |
| 1000000 | 239005.7361 |
| 8368000 | 2000000 |
Frequently Asked Questions
How do I convert joules to calories?
Divide by 4.184. For example, 1,000 J ÷ 4.184 ≈ 239 calories — that is 239 scientific calories, not food Calories.
Are these the same calories as on food labels?
No. Food labels print kilocalories (kcal), each worth 1,000 of the calories here. A 250-Calorie snack is 250 kcal = 250,000 cal = 1,046,000 joules. This is the most common energy-unit mistake there is.
How many joules is 1 kcal?
4,184 joules, or 4.184 kJ. So a 2,000 kcal daily diet is 8,368 kJ — the figure Australian and European labels print directly.
Why is the calorie still used at all?
It was defined as the energy to heat one gram of water by one degree Celsius, which made it intuitive for chemistry and nutrition long before SI. Science has largely moved to joules, but nutrition kept the calorie because consumers recognise it.