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: PSI = Torr × 0.01934
Multiply any torr value by 0.01934 to get psi.
Reverse: Torr = PSI × 51.72
Common torr values — factor: 1 Torr = 0.01934 psi
| Torr (Torr) | PSI (psi) | Context |
|---|---|---|
| 0.001 Torr | 1.934e-05 psi | Ultra-high vacuum |
| 0.01 Torr | 0.0001934 psi | High vacuum |
| 0.1 Torr | 0.001934 psi | Medium vacuum |
| 1 Torr | 0.01934 psi | Low vacuum |
| 10 Torr | 0.1934 psi | Rough vacuum |
| 100 Torr | 1.934 psi | Near-vacuum |
| 760 Torr | 14.7 psi | 1 atm / sea level |
| 1,000 Torr | 19.34 psi | Slight above atm |
| 7,600 Torr | 147 psi | 10 atm |
| 1e+04 Torr | 193.4 psi | 100 mbar |
| 7.6e+04 Torr | 1,470 psi | 100 atm |
| 100,000 Torr | 1,934 psi | 1.3 atm |
| 760,000 Torr | 1.47e+04 psi | 1,000 atm |
| 1,000,000 Torr | 1.934e+04 psi | High pressure |
| 10,000,000 Torr | 193,400 psi | Very high |
1 Torr = 0.01934 psi. Memorize for instant estimates.
Use 0.0193 as a quick mental multiplier.
Multiply result by 51.72 to recover the original Torr value.
Inflates and checks car, truck, and bicycle tires to specified psi pressures.
Specifies refrigerant pressures and system test pressures in psi for US equipment.
Designs hydraulic systems rated in psi for American industrial machinery.
Monitors tank pressure (3,000 psi fill) and reserve pressure on US-spec gauges.
Specifies pipe pressure ratings and test pressures in psi for US plumbing codes.
Checks oil pressure (35–65 psi), coolant pressure, and brake line pressure in psi.
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.
PSI (pounds per square inch) is the primary pressure unit in the United States, UK, and other countries using Imperial measures. It equals the force of one pound-force applied over one square inch of area (6,894.76 Pa).
PSI is used for tire pressure (car: 30–35 psi, truck: 80–120 psi), blood pressure measurement in the US, boiler pressure ratings, and hydraulic system specifications in American engineering.
Interesting fact: The deepest ocean dive by a human (Victor Vescovo, 2019, 10,928 m) would have experienced about 15,900 psi of external pressure on the submersible hull.
Converting torr to psi 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 = 0.09668 psi and 10 Torr = 0.1934 psi. For the reverse: 1 psi = 51.72 Torr. The exact factor is 1 Torr = 0.01934 psi.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.