Convert psi to torr

1 psi=51.7149Torr

Use the converter below to change any psi value into torr instantly — with formula, conversion table, and real-world examples.

You have

Equals

51.71493

Conversion formula

Forward

torr = psi × 51.7149

Reverse

psi = torr × 0.01934

Example: 10 psi × 51.7149 = 517.149 Torr.

About both units

From

Pound per Square Inch

psi

Pounds per square inch equals approximately 6895 Pa. It is the dominant pressure unit in the US — tyre pressures, plumbing, compressed air. Standard US tyre pressure: 32–35 psi.

Real-world: US tyre: 32–35 psi. Water supply: 40–60 psi. SCUBA tank: 3000 psi. Car AC system: 30–200 psi.

Read full pound per square inch reference →

Torr

The torr equals 1/760 atm — approximately 133.32 Pa. Essentially equivalent to mmHg but defined slightly differently. Used in vacuum-system engineering and older physics.

Real-world: Low-vacuum: 760 to 25 torr. High-vacuum: 10⁻³ to 10⁻⁹ torr. Semiconductor fabrication: often below 10⁻⁶ torr.

Read full torr reference →

Pound per Square Inch to Torr conversion table

Common psi to torr values for quick reference.

Pound per Square Inch (psi)	Torr (Torr)
1 psi	51.7149 Torr
5 psi	258.575 Torr
10 psi	517.149 Torr
25 psi	1,292.87 Torr
50 psi	2,585.75 Torr
100 psi	5,171.49 Torr
200 psi	10,342.99 Torr
500 psi	25,857.47 Torr
1,000 psi	51,714.93 Torr
5,000 psi	258,574.66 Torr

Tips & common mistakes

Quick tips

1 psi ≈ 6.9 kPa = 0.069 bar.
14.7 psi = 1 atm = 1.01 bar.
Most US pressure gauges show psi.

Avoid these

Setting a European tyre at 35 bar instead of 35 psi — disaster.
Confusing psi (gauge) with psia (absolute).
Using psi in scientific papers — prefer Pa or MPa.

Frequently asked questions

How many torr in a pound per square inch?

One pound per square inch equals 51.7149 torr.

How do I convert psi to torr?

Multiply the pound per square inch value by 51.7149 to get the equivalent in torr.

What is 100 psi in torr?

100 psi equals 5,171.49 torr.

Is a pound per square inch bigger than a torr?

Yes. 1 pound per square inch equals 51.7149 torr, so one pound per square inch is larger.

How to convert psi to torr without a calculator?

Multiply by 51.71 for a quick estimate; use a calculator for precise results.

Related pressure conversions

📊 See full comparison matrix →

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