MeasureCalc

Convert Torr to Standard atmosphere (atm)

Category: Pressure

0.001316 atm

1 torr = 0.001316 atm

High-precision rounding: 6 decimals

How to convert torr to standard atmosphere (atm)

Pressure is force per unit area. Pascals (and kPa, hPa) are SI, while bar and psi are widely used in engineering and scuba. Conversions must respect absolute vs gauge references when comparing values.

This converter calculates Torr to Standard atmosphere (atm) values by using the correct conversion rule for the Pressure category. For linear units, standardized factors are used. For temperature, the calculator applies the proper formula with offsets.

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Quick conversion table

Handy values for Torr to Standard atmosphere (atm). Click a value to open that exact result.

Torr Standard atmosphere (atm)
1 0.001316
0.5 0.000658
2.5 0.003289
10 0.013158

Conversion formula

Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).

Common mistakes

  • Comparing gauge pressure (psig) with absolute pressure (psia/hPa) without converting reference.
  • Mixing bar with atm (1 atm = 1.01325 bar).

Unit facts

  • Torr: Torr is ≈133.322368 Pa; named after Torricelli (barometer). Used in vacuum science.
  • Standard atmosphere (atm): Standard atmosphere is exactly 101,325 Pa; reference pressure in chemistry and physics.

About Torr

Torr

≈133.322 Pa. Preferred in high-vacuum work alongside millitorr and microns.

History: Named after Torricelli; bridges historical millimeters of mercury (mmHg) with SI pascals.

About Standard atmosphere (atm)

Standard atmosphere (atm)

Exactly 101,325 Pa. Reference pressure for chemistry and gas laws; useful for normalizing conditions.

History: A conventional unit set for convenience in calculations and comparative tables.

Frequently asked questions

How many Standard atmosphere (atm) are in one Torr?
1 Torr equals 0.001316 Standard atmosphere (atm).
Is Torr to Standard atmosphere (atm) conversion exact?
Many unit conversions are exact by definition, while others use standardized conversion constants.
What is the fastest way to convert Torr to Standard atmosphere (atm)?
Enter a value in Torr, choose Standard atmosphere (atm) as the target unit, and the calculator will instantly return the result.

Convert Torr to other units

Convert other units to Standard atmosphere (atm)