How many psi are in 1 torr?

1 torr equals 0.0193367747 psi, using the exact defined conversion factor rather than an estimate.

How do I convert torr to psi?

Multiply the torr value by 0.0193367747. The converter above does this instantly to whatever precision you set.

How do I convert psi back to torr?

Use the reverse factor: 1 psi equals 51.71493257 torrs. You can also use the swap control in the converter above to flip the direction instantly.

Torr (Torr) is a unit of engineering.

Is the torr to psi conversion exact?

Yes. PSI (pounds-force per square inch) equals exactly 6,894.757293168 pascals. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.

Why do engineering unit conventions vary so much by region and industry?

Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.

Torrs to PSI Converter

Q: What is a psi?

PSI (psi) measures pressure. PSI (pounds-force per square inch) equals exactly 6,894.757293168 pascals. It is classified as a US/imperial customary unit.

About Converting Torrs to PSI

Torr and PSI both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: A torr is 1/760 standard atmosphere, and pounds per square inch.

Formula

psi = torrs × 0.0193367747046

This factor comes from each unit's defined relationship to the category's base unit: 1 torr equals 133.322368421 base units, and 1 psi equals 6894.75729317 base units, so dividing one by the other gives the direct torr-to-psi factor of 0.0193367747046.

Simple example

1 Torr × 0.0193367747 = 0.0193367747 psi

1 torr = 0.0193367747 psi.

Real-world example

100 Torr × 0.0193367747 = 1.93367747 psi

100 torrs = 1.93367747 psi.

Conversion table

Torr (Torr)	PSI (psi)
1 Torr	0.0193367747 psi
10 Torr	0.193367747 psi
50 Torr	0.9668387352 psi
100 Torr	1.93367747 psi
500 Torr	9.668387352 psi
1,000 Torr	19.3367747 psi

Reverse conversion: PSI to Torr

0.0193367747 psi × 51.71493257 = 0.9999999998 Torr

0.0193367747 psi = 0.9999999998 torrs.

torrs = psi × 51.7149325715

For a page dedicated to this direction, see PSI to Torr.

Understanding the Torr (Torr)

A torr is 1/760 standard atmosphere.

Understanding the PSI

PSI (psi) measures pressure. PSI (pounds-force per square inch) equals exactly 6,894.757293168 pascals. It is classified as a US/imperial customary unit.

Where it's used: United States (standard pressure unit for tires, tools, and plumbing)

Uses of the PSI today

Tire pressure specifications in the US
Hydraulic and pneumatic system ratings
Plumbing, compressed-air tools, and industrial equipment ratings

History of the PSI

PSI is a derived unit from the pound-force and the inch, both themselves standardized through English and later international agreements rather than invented as a pressure unit from scratch.

It became the default pressure unit in US engineering as pound-force and inch-based measurement dominated American industry through the 19th and 20th centuries, and it remains in everyday use for tires and tools even as most other measurements in the US context stay imperial.

Historical origin. PSI was not the invention of a single named person; it developed through the process described above.

PSI — sources

NIST Special Publication 811 — Guide for the Use of the International System of Units — Documents conversion factors for psi and other US customary pressure units.

Torrs to PSI Converter — Torr to psi

Engineering Converter