Convert pressure units — Pascal, bar, PSI, atm, Torr, mmHg.
| Unit | Name | Value |
|---|---|---|
| kPa | Kilopascal | 0.001 |
| bar | Bar | 0.00001 |
| atm | Atmosphere | 0.0000098692327 |
| psi | PSI | 0.00014503768 |
| Torr | Torr / mmHg | 0.0075006376 |
| inHg | Inch of Mercury | 0.00029529971 |
Formula: Torr = Pascal × 0.007501
Multiply any pascal value by 0.007501 to get torr.
Reverse: Pascal = Torr × 133.3
Common pascal values — factor: 1 Pa = 0.007501 Torr
| Pascal (Pa) | Torr (Torr) | Context |
|---|---|---|
| 1 Pa | 0.007501 Torr | 1 Pa — light breeze |
| 100 Pa | 0.7501 Torr | 1 mbar |
| 1,000 Pa | 7.501 Torr | 10 mbar |
| 1e+04 Pa | 75.01 Torr | 0.1 atm |
| 101,300 Pa | 760 Torr | 1 atm / sea level |
| 200,000 Pa | 1,500 Torr | 2 bar |
| 500,000 Pa | 3,750 Torr | 10 bar |
| 1,000,000 Pa | 7,501 Torr | 10 bar |
| 10,000,000 Pa | 7.501e+04 Torr | 100 bar |
| 100,000,000 Pa | 750,100 Torr | 1,000 bar |
| 6,895 Pa | 51.72 Torr | 1 psi |
| 133.3 Pa | 1 Torr | 1 mbar |
| 3,386 Pa | 25.4 Torr | 1 psi |
| 9.807e+04 Pa | 735.6 Torr | 1 atm / sea level |
| 1.000e+09 Pa | 7,501,000 Torr | 10,000 bar |
1 Pa = 0.007501 Torr. Memorize for instant estimates.
Use 0.0075 as a quick mental multiplier.
Multiply result by 133.3 to recover the original Pa value.
Measures sound pressure levels in pascals — 20 μPa is the threshold of hearing.
Measures wind load on structures and façade pressure in pascals.
Specifies air pressure differentials across filters and dampers in Pa.
Calibrates pressure instruments traceable to SI pascal standards.
Solves Navier-Stokes equations with pressure in pascals.
Controls process chamber pressure in mPa range for deposition processes.
The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square meter. It was named after Blaise Pascal, the 17th-century French mathematician and physicist who studied fluid pressure. The unit was officially adopted by the International System of Units in 1971.
Pascals are used in meteorology (atmospheric pressure ~101,325 Pa), materials science (Young's modulus in GPa), and fluid mechanics. The pascal is very small — standard atmospheric pressure equals 101,325 Pa.
Interesting fact: Blaise Pascal demonstrated in 1648 that atmospheric pressure decreases with altitude by carrying a barometer up the Puy de Dôme mountain, confirming Torricelli's theory of atmospheric pressure.
The torr was named after Evangelista Torricelli, who invented the mercury barometer in 1644. One torr is defined as 1/760 of standard atmospheric pressure (133.322 Pa), and is equal to 1 mmHg at 0°C.
Torr is the standard pressure unit in vacuum science and semiconductor manufacturing. High vacuum systems operate at 10⁻³ to 10⁻⁷ torr. Ultra-high vacuum (used in particle accelerators) reaches below 10⁻¹⁰ torr.
Interesting fact: Torricelli's original barometer experiment used a 1-meter tube of mercury that settled at 760 mm above the reservoir — directly defining the unit that would later bear his name.
Converting pascal to torr is a common task in engineering, medicine, meteorology, and science. Different industries and countries use different pressure units — PSI in the US, bar in Europe, mmHg in medicine, and pascals in physics — making accurate conversion essential for cross-disciplinary work.
Quick reference: 5 Pa = 0.0375 Torr and 10 Pa = 0.07501 Torr. For the reverse: 1 Torr = 133.3 Pa. The exact factor is 1 Pa = 0.007501 Torr.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.