The Atmosphere (unit) reference article from the English Wikipedia on 24-Jul-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Atmosphere (unit)

When expressed as a measurement, an atmosphere is a unit of barometric pressure or atmospheric pressure. It is equal to:

• 101.325 kilopascals
• 1013.25 hectopascals
• 1013.25 millibars
• 29.92 inches of mercury
• 760 millimeters or mercury

One atmosphere (1 atm.) is the average pressure at sea level on the Earth.

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