UnitConvConvert
Pressure

Convert torr to psi

1 Torr=0.01934psi

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

0.019337

Conversion formula

Forward
psi = torr × 0.01934
Reverse
torr = psi × 51.7149

Example: 10 Torr × 0.01934 = 0.1934 psi.

About both units

From

Torr

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 →
To

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 to Pound per Square Inch conversion table

Common torr to psi values for quick reference.

Torr (Torr)Pound per Square Inch (psi)
1 Torr0.01934 psi
5 Torr0.09668 psi
10 Torr0.1934 psi
25 Torr0.4834 psi
50 Torr0.9668 psi
100 Torr1.93368 psi
200 Torr3.86735 psi
500 Torr9.66839 psi
1,000 Torr19.3368 psi
5,000 Torr96.6839 psi

Tips & common mistakes

Quick tips

  • 1 Torr ≈ 1 mmHg (differ by ~1 ppm — negligible in practice).
  • 1 atm = 760 Torr exactly.
  • Named after Evangelista Torricelli, inventor of the barometer.

Avoid these

  • Assuming torr and mmHg are truly identical — they differ by ~10⁻⁷; only matters in metrology.
  • Using Torr in everyday context — obscure outside vacuum engineering.
  • Mixing Torr and mTorr without specification.

Frequently asked questions

How many psi in a torr?
One torr equals 0.01934 psi.
How do I convert torr to psi?
Multiply the torr value by 0.01934 to get the equivalent in psi.
What is 100 torr in psi?
100 torr equals 1.93368 psi.
Is a torr bigger than a pound per square inch?
No. 1 torr equals 0.01934 psi, so one torr is smaller.
How to convert torr to psi without a calculator?
Multiply by 0.02 for a quick estimate; use a calculator for precise results.

Related pressure conversions

📊 See full comparison matrix →

More from Torr

Torr → Pa
1 = 133.322 Pa
Torr → kPa
1 = 0.1333 kPa
Torr → MPa
1 = 0.0001333 MPa
Torr → bar
1 = 0.001333 bar
Torr → mbar
1 = 1.33322 mbar
Torr → atm
1 = 0.001316 atm
Torr → mmHg
1 = 1 mmHg
Torr → inHg
1 = 0.03937 inHg

More to Pound per Square Inch

Pa → psi
1 = 0.000145 psi
kPa → psi
1 = 0.145 psi
MPa → psi
1 = 145.038 psi
bar → psi
1 = 14.5038 psi
mbar → psi
1 = 0.0145 psi
atm → psi
1 = 14.6959 psi
mmHg → psi
1 = 0.01934 psi
inHg → psi
1 = 0.4912 psi

Conversions in other categories

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