Torr to Pound per Square Inch Formula
psi = Torr x 0.0193368
Conversion factors follow SI relationships published by BIPM and NIST, where those standards apply.
Torr to Pound per Square Inch Converter
Quick Answer
1 Torr = 0.0193368 psi
Formula: Pound per Square Inch = Torr x 0.0193368
Quick values
Worked examples
Convert 1 Torr to psi
psi = 1 x 0.0193368
Result: 1 Torr = 0.0193368 psi
Convert 10 Torr to psi
psi = 10 x 0.0193368
Result: 10 Torr = 0.193368 psi
Convert 100 Torr to psi
psi = 100 x 0.0193368
Result: 100 Torr = 1.93368 psi
About Torr and Pound per Square Inch
1 torr is 1/760 of a standard atmosphere (101,325/760 Pa). PSI is pound-force per square inch. Vacuum and lab gauges often read torr or mmHg while US mechanical specs stay in psi.
Category hub: Pressure Conversion · Conversion charts · Conversion formulas
Torr to Pound per Square Inch Conversion Table
| Torr (Torr) | Pound per Square Inch (psi) |
|---|---|
| 1 Torr | 0.0193368 psi |
| 10 Torr | 0.193368 psi |
| 50 Torr | 0.966839 psi |
| 100 Torr | 1.93368 psi |
| 200 Torr | 3.86735 psi |
| 400 Torr | 7.73471 psi |
| 760 Torr | 14.6959 psi |
| 1000 Torr | 19.3368 psi |
Browse all conversion charts → · Browse conversion formulas →
Practical use cases for Torr to Pound per Square Inch
Vacuum pump curves
Pump catalogs in torr must match US chamber specs in psia. 760 torr is 14.696 psi.
Process vacuum setpoints
A 50 torr roughing setpoint is 0.967 psi absolute. PLC analog scales need the psi count.
Leak-test procedures
Helium leak recipes written in torr convert to psi when the shop gauge is imperial.
Medical suction
Some suction regulators are torr/mmHg while facility drawings stay in psi. Clinicians convert before a swap.
Torr to Pound per Square Inch FAQs
Common questions about converting torr to pound per square inch.
How do you convert torr to PSI?
Multiply torr by 0.0193368 (133.322 Pa ÷ 6,894.757 Pa). Example: 760 torr = 14.6959 psi (1 atm), 100 torr = 1.9337 psi, 1 torr = 0.019337 psi.
Is 1 torr the same as 1 mmHg?
They are treated as equal in most lab work (1/760 atm). Conventional mmHg uses a mercury-column definition that differs in the last digits. This page converts the torr unit in the site database, not a temperature-corrected mercury column.
What is a rough vacuum of 50 torr in PSI?
50 torr ≈ 0.9668 psi absolute. That is far below atmospheric 14.7 psia — useful when a US vacuum spec is written in psi and the pump curve is in torr.
Where does the torr to PSI factor come from?
Torr is defined from the standard atmosphere. PSI is defined from pound-force and the international inch. Both are realized against the pascal in NIST/BIPM tables.
Charts and printable PDF
Use the matching torr / pound per square inch chart when you need a printable table or offline reference.
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