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Pressure

Torrtoatm

Convert torr (Torr) to standard atmospheres (atm).

Factor1 Torr = 0.001315789 atm

Converter

Torr

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1atm

Rendered to 6 significant figures.

Formula

Formula
atm = Torr × 0.001315789

Multiply any value in torr by 0.001315789 to obtain the value in standard atmospheres.

Worked example

Convert 760 Torr to atm.

  1. 01Start with 760 Torr.
  2. 02Multiply by the conversion factor: 760 × 0.001315789 = 1 atm.
Result760 Torr = 1 atm

Conversion table

Torratm
10.0013158
20.0026316
50.0065789
100.013158
200.026316
500.065789
1000.13158
2000.26316
5000.65789
10001.3158

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from Torr to atm?
1 Torr equals 0.001315789 atm. To convert, multiply the value in torr by 0.001315789.
How do I convert 1 Torr to atm?
1 Torr = 0.00131579 atm. For any value, multiply by 0.001315789.
How do I convert atm back to Torr?
Divide by the same factor — or equivalently, multiply by 760. So 1 atm = 760 Torr.
When would I need to convert torr to standard atmosphere?
Pressure conversions between Torr and atm are common when working with mixed-vendor instrumentation, when piping codes use different units to process datasheets, or when converting field readings into SI for hydraulic calculations.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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