Pounds per square inch (psi) to Torr (Torr) Conversion
Pounds per square inch
Pounds per square inch (psi) is a unit of pressure defined as one pound-force per square inch (approximately 6,894.76 Pa). It is the standard for tyre pressure, hydraulic systems, and gas cylinders in the United States. Standard atmospheric pressure is approximately 14.696 psi. In engineering, gauge pressure (psig — relative to atmosphere) is distinguished from absolute pressure (psia — relative to a perfect vacuum), a distinction critical in thermodynamics and fluid system design.
Torr
The torr is a unit of pressure named after Evangelista Torricelli, the Italian physicist who invented the mercury barometer in 1643. One torr is defined as exactly 1/760 of a standard atmosphere (approximately 133.322 Pa). Numerically nearly identical to the millimetre of mercury (mmHg), it differs by less than 0.000015%. The torr is used in vacuum science and engineering: rough vacuum is 1–100 torr, fine vacuum 10⁻³–1 torr, and ultra-high vacuum below 10⁻⁹ torr.
| Pounds per square inch (psi) | Torr (Torr) |
|---|---|
| 0.1 psi | 5.1715 Torr |
| 1 psi | 51.7149 Torr |
| 2 psi | 103.4299 Torr |
| 3 psi | 155.1448 Torr |
| 5 psi | 258.5747 Torr |
| 10 psi | 517.1493 Torr |
| 20 psi | 1,034.2987 Torr |
| 30 psi | 1,551.448 Torr |
| 50 psi | 2,585.7466 Torr |
| 100 psi | 5,171.4933 Torr |
| 1000 psi | 51,714.9326 Torr |
Frequently Asked Questions (FAQ)
How many torr are in 1 pounds per square inch?
1 pounds per square inch (psi) is exactly 51.715 torr (Torr).
How do I convert pounds per square inch to torr?
Multiply the value in pounds per square inch by 51.715 to get the result in torr. Or use the converter above — type any number and see the result instantly.