Convert Pounds per square inch (psi) (psi) to Torr (torr)
Category: Pressure
1 psi = 51.714933 torr
High-precision rounding: 6 decimals
How to convert pounds per square inch (psi) to torr
We convert by pivoting through the SI base unit for Pressure and applying exact factors where applicable.
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Examples
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Comparing gauge pressure (psig) with absolute pressure (psia/hPa) without converting reference.
- Mixing bar with atm (1 atm = 1.01325 bar).
About Pressure
Pressure is force per unit area. Pascals (and kPa, hPa) are SI, while bar and psi are widely used in engineering and scuba. Conversions must respect absolute vs gauge references when comparing values.
About Pounds per square inch (psi)
Pounds per square inch (psi)
Imperial/US pressure unit. Common for tires, hydraulics, and compressors; often shown with gauge (psig) vs absolute (psia).
History: Industrial adoption in North America entrenched psi as a practical non-SI unit.
About Torr
Torr
≈133.322 Pa. Preferred in high-vacuum work alongside millitorr and microns.
History: Named after Torricelli; bridges historical millimeters of mercury (mmHg) with SI pascals.
Related conversions to torr
- bar → torr Bar
- pa → torr Pascal (Pa)
- atm → torr Standard atmosphere (atm)