Atmospheres (atm) are units commonly used to express atmospheric or air pressures. One atmosphere is approximately equal to the average air pressure at sea level on Earth.
Related terms
Torr: Torr is another unit used to measure pressure, where 1 atm is equal to approximately 760 torr.
Pascal (Pa): Pascal is the SI unit for pressure, and 1 atm is approximately equal to 101325 Pa.
Millimeters of Mercury (mmHg): Millimeters of mercury are units commonly used in medicine to measure blood pressure. 1 atm is approximately equal to 760 mmHg.