Millibar to Torr Converter
Common Conversions
| mbar | torr |
|---|---|
| 0.01 | 0.0075 |
| 0.1 | 0.075 |
| 0.25 | 0.1875 |
| 0.5 | 0.375 |
| 1 | 0.75 |
| 2 | 1.5 |
| 5 | 3.75 |
| 10 | 7.501 |
| 25 | 18.752 |
| 50 | 37.503 |
| 100 | 75.006 |
| 1000 | 750.062 |
Why this conversion matters in chemistry
Vacuum-pump and freeze-dryer instrumentation reads in millibar; vapor-pressure tables, classical catalysis protocols, and a generation of organic-chemistry distillation references stay in torr. The factor is 0.750062 torr per mbar — falling out of 760 torr per atm and 1013.25 mbar per atm. A 1 mbar regeneration pressure for molecular sieves becomes 0.75 torr in the original catalyst-activation reference. Multiplying is a routine unit conversion at the boundary between the modern digital instrument and the legacy method sheet it's reproducing.
Formula
Worked Examples
Standard atmospheric pressure expressed in both unit systems.
The factor itself, a useful sanity check on a vacuum-gauge reading.
A typical Schlenk-line working vacuum, deep enough for routine air-sensitive transfers.
A moderate rotary-evaporator vacuum for moderately volatile solvents.