Atmospheres (atm) - Pressure Conversions
An atmosphere (or standard atmosphere) is a non-SI unit of Pressure. The symbol for atmosphere is atm. An atmosphere is equal to 101,325 newtons per square meter at sea level.
Select a Conversion
Select one of the atmosphere conversions below:
Unit Summary
This table provides a summary of the Pressure units within their respective measurement systems.
| Unit | Symbol | Measurement System |
|---|---|---|
| pascal | Pa | International System of Units (SI) |
| kilopascal | kPa | International System of Units (SI) |
| megapascal | MPa | International System of Units (SI) |
| atmosphere | atm | Non-SI (International) |
| pounds per square inch | psi or lbf/in2 | Non-SI (International) |
| millimeters of mercury | mmHg | Non-SI (International) |
| bar | bar | Non-SI (International) |
| torr | Torr | Non-SI (International) |
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