Calories to Joules
Convert thermochemical small calories to joules for physics, chemistry, heat energy, and classroom unit checks.
How to convert cal to J
To convert a value from thermochemical calories (cal) to joules (J), enter the number in the converter above. Use the swap control if you need the reverse direction.
x is the source value in cal; y is the result in J.
Popular conversions
Quick answers for common cal to J values are available from the related conversion pages.
Use the related tools section for fixed-value conversions and the reverse direction.
Common conversion table
Quick reference table for common cal to J values:
| cal | J |
|---|---|
| 1 | 4.184 |
| 5 | 20.92 |
| 10 | 41.84 |
| 50 | 209.2 |
| 100 | 418.4 |
| 1,000 | 4,184 |
About thermochemical calories
Thermochemical calorie (cal) — One thermochemical small calorie is exactly 4.184 joules. It is not the same display convention as a food Calorie on US labels.
Common uses: Small calories are used in physics, chemistry, heat energy examples, and classroom unit conversions.
About joules
Joule (J) — The joule is the SI derived unit of energy. One joule is one watt-second.
Common uses: Joules are used in physics, chemistry, engineering, mechanics, heat energy, and SI energy specifications.
Frequently Asked Questions
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