Torr to atm Conversion Calculator

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Choose which direction to convert. The result panel updates all units either way.
Enter a pressure value in torr (mmHg). 760 Torr = 1 atm = standard sea-level pressure.
Torr
Atmospheres
1atm

Standard atmosphere (1 atm = 101,325 Pa)

Torr760Torr
Pascals101,325Pa
Kilopascals101.325kPa
Bar1.01325bar
Millibar1,013.25mbar
Pounds per sq inch14.695949psi
Inches of mercury29.92126inHg
1 atm
Ultra-high vacuum<0.001High/medium vacuum0.001-0.1Partial vacuum0.1-0.9Atmospheric0.9-1.1Pressurised1.1+

760.0000 Torr = 1.000000 atm

  • This is close to standard sea-level atmospheric pressure (1 atm = 760 Torr = 101,325 Pa).
  • In SI units this equals 101325.00 Pa (101.3250 kPa).
  • The Torr is defined as exactly 1/760 of a standard atmosphere, so the conversion is exact with no rounding error introduced by the ratio itself.

Next stepFor vacuum science work, note that the millibar (mbar) and hectopascal (hPa) are numerically identical and are the preferred units in meteorology and many European vacuum standards.

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