Convert pressure units — Pascal, bar, PSI, atm, Torr, mmHg.
| Unit | Name | Value |
|---|---|---|
| Pa | Pascal | 133.322 |
| kPa | Kilopascal | 0.133322 |
| bar | Bar | 0.00133322 |
| atm | Atmosphere | 0.0013157858 |
| psi | PSI | 0.019336714 |
| inHg | Inch of Mercury | 0.039369949 |
Formula: Pascal = Torr × 133.3
Multiply any torr value by 133.3 to get pascal.
Reverse: Torr = Pascal × 0.007501
Common torr values — factor: 1 Torr = 133.3 Pa
| Torr (Torr) | Pascal (Pa) | Context |
|---|---|---|
| 0.001 Torr | 0.1333 Pa | Ultra-high vacuum |
| 0.01 Torr | 1.333 Pa | High vacuum |
| 0.1 Torr | 13.33 Pa | Medium vacuum |
| 1 Torr | 133.3 Pa | Low vacuum |
| 10 Torr | 1,333 Pa | Rough vacuum |
| 100 Torr | 1.333e+04 Pa | Near-vacuum |
| 760 Torr | 101,300 Pa | 1 atm / sea level |
| 1,000 Torr | 133,300 Pa | Slight above atm |
| 7,600 Torr | 1,013,000 Pa | 10 atm |
| 1e+04 Torr | 1,333,000 Pa | 100 mbar |
| 7.6e+04 Torr | 10,130,000 Pa | 100 atm |
| 100,000 Torr | 13,330,000 Pa | 1.3 atm |
| 760,000 Torr | 101,300,000 Pa | 1,000 atm |
| 1,000,000 Torr | 133,300,000 Pa | High pressure |
| 10,000,000 Torr | 1.333e+09 Pa | Very high |
1 Torr = 133.3 Pa. Memorize for instant estimates.
Use 133.3 as a quick mental multiplier.
Multiply result by 0.007501 to recover the original Torr 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 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.
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.
Converting torr to pascal 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 Torr = 666.6 Pa and 10 Torr = 1333 Pa. For the reverse: 1 Pa = 0.007501 Torr. The exact factor is 1 Torr = 133.3 Pa.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.