Convert Torr to Millibars
Convert Torr (Torr) to Millibars (mbar) instantly and accurately.
Conversion Formula
mbar = Torr × 1.333223684
About Torr
The torr is defined as exactly 1/760 of a standard atmosphere ≈ 133.322 Pa - effectively replacing mmHg with an exact definition. Named after Evangelista Torricelli (1608-1647), inventor of the barometer. Vacuum science universally uses torr: rough vacuum 760-1 torr; medium vacuum 1-10⁻³ torr; high vacuum 10⁻³-10⁻⁷ torr; ultra-high vacuum below 10⁻⁹ torr. UHV systems for surface science, particle accelerator beam tubes, and space simulation chambers reach 10⁻¹¹-10⁻¹² torr. 1 torr = 133.322 Pa.
About Millibars
A millibar (mbar) = 100 Pa = 1 hPa - the historically dominant meteorological pressure unit. Standard sea-level pressure is 1013.25 mbar. Hurricane intensity is characterised by central pressure: Category 5 storms typically below 920 mbar (US record: 892 mbar, 1935). Upper-air analysis levels - 850, 700, 500, 300, 200 mbar - appear throughout decades of archived meteorological data. Aircraft cabins are pressurised to ~750-800 mbar at cruise altitude. 'Weather bombs' see pressure fall 24+ mbar in 24 hours. 1 mbar = 100 Pa.
Quick Reference Table
| Torr (Torr) | Millibars (mbar) |
|---|---|
| 1 Torr | 1.33322 mbar |
| 2 Torr | 2.66645 mbar |
| 5 Torr | 6.66612 mbar |
| 10 Torr | 13.3322 mbar |
| 25 Torr | 33.3306 mbar |
| 50 Torr | 66.6612 mbar |
| 100 Torr | 133.322 mbar |