Atmosphere (atm) Conversion Calculator

Pascals (Pa)
101,325
Millimeters of Mercury (mmHg)
760
Pounds per Square Inch (PSI)
14.696
Bars
1.01325
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Understanding Atmospheric Pressure

What is an Atmosphere?

An atmosphere (atm) is a unit of pressure equal to the average pressure of Earth's atmosphere at sea level. It serves as a reference point in various scientific and engineering applications.

Standard Atmospheric Pressure

1 atmosphere equals exactly:

  • 101,325 pascals (Pa)
  • 760 millimeters of mercury (mmHg)
  • 14.696 pounds per square inch (psi)
  • 1.01325 bars