Convert Torr to Hectopascals
Convert Torr (Torr) to Hectopascals (hPa) instantly and accurately.
Conversion Formula
hPa = 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 Hectopascals
A hectopascal (hPa) = 100 Pa = 1 mbar - the WMO-official SI-compatible meteorological pressure unit since 1986, replacing millibar with no numerical change. All modern surface observations (METAR, SYNOP), digital barometers, aviation weather, and weather apps report in hPa. QNH altimeter settings outside North America are in hPa. ICAO standard sea-level pressure is 1013.25 hPa. Continental high-pressure record exceeds 1084 hPa; Typhoon Tip (1979) holds the low record at ~870 hPa. 1 hPa = 100 Pa.
Quick Reference Table
| Torr (Torr) | Hectopascals (hPa) |
|---|---|
| 1 Torr | 1.33322 hPa |
| 2 Torr | 2.66645 hPa |
| 5 Torr | 6.66612 hPa |
| 10 Torr | 13.3322 hPa |
| 25 Torr | 33.3306 hPa |
| 50 Torr | 66.6612 hPa |
| 100 Torr | 133.322 hPa |