🔋 Energy · Comparison
Joule (J) vs Calorie (cal)
See the key differences, formulas, and conversion table.
// Side-by-side
| Joule (J) (J) | Calorie (cal) (cal) | Joule (J) (J) ← |
|---|---|---|
| 1 J | 0.239006 cal | 1 cal = 4.184 J |
| 5 J | 1.195029 cal | 5 cal = 20.92 J |
| 10 J | 2.390057 cal | 10 cal = 41.84 J |
| 20 J | 4.780115 cal | 20 cal = 83.68 J |
| 25 J | 5.975143 cal | 25 cal = 104.6 J |
| 50 J | 11.950287 cal | 50 cal = 209.2 J |
| 100 J | 23.900574 cal | 100 cal = 418.4 J |
| 200 J | 47.801147 cal | 200 cal = 836.8 J |
| 500 J | 119.50287 cal | 500 cal = 2,092 J |
| 1000 J | 239.00574 cal | 1000 cal = 4,184 J |
Joule (J) to Calorie (cal) formula
cal = J × 0.239006
Calorie (cal) to Joule (J) formula
J = cal × 4.184
How to use this comparison
Joule (J) vs Calorie (cal) in practice
Use this page when you need to compare Joule (J) and Calorie (cal) side by side, explain the difference to someone else, or sanity-check both directions at once. Use the dedicated converter when you already know the direction and just need a precise result for one value.
Best for comparison
Read the ratio, quick table, and reverse formula before choosing which unit to show in a report or product UI.
Use converter for precision
For a single value, open the J to cal or cal to J converter and keep the result tied to one direction.
Common mistake
Do not reuse the J to cal multiplier for the reverse direction. The reverse multiplier is 4.184, not 0.239006.
// Frequently Asked Questions
What is the difference between Joule (J) and Calorie (cal)?▼
Joule (J) (J) and Calorie (cal) (cal) are both units of energy. 1 J = 0.239006 cal, and 1 cal = 4.184 J.
How do you convert Joule (J) to Calorie (cal)?▼
To convert Joule (J) to Calorie (cal), multiply by 0.239006. Formula: cal = J × 0.239006.
How do you convert Calorie (cal) to Joule (J)?▼
To convert Calorie (cal) to Joule (J), multiply by 4.184. Formula: J = cal × 4.184.
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