reference
Gas Constant R Values Reference
Gas constant R reference table for unit conversions.
The value of R depends on the units used for pressure and volume. Always match R to your problem's units.
Common gas constant R values (all with mol and K in denominator)
| R value | Pressure unit | Volume unit | Energy unit |
|---|---|---|---|
| 0.08206 | atm | L | — |
| 8.314 | Pa (N/m²) | m³ | J |
| 8.314 | kPa | L | J |
| 62.36 | mmHg (torr) | L | — |
| 1.987 | cal | — | cal/(mol·K) |
| 0.08314 | bar | L | — |
Frequently asked questions
How do I use this Ideal Gas Law reference?
Find your category or range in the table, then use the linked calculator to compute an exact value for your inputs.
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Ideal Gas Law Calculator