Atmospheres to Millimeters of Mercury Converter

To convert a measurement in atmospheres to millimeters of mercury, multiply the value by 759.999892. The conversion factor comes from the relationship between both units and the pascal.

For example, to convert 5 atm to millimeters of mercury: 5 × 759.999892 = 3,799.9995 mmHg.

A standard atmosphere (atm) is a unit of pressure defined as exactly 101,325 pascals, approximating average sea-level air pressure. Defined by the International Union of Pure and Applied Chemistry as a reference pressure, the atmosphere is widely used in chemistry and physics to describe conditions relative to sea level.

Common uses of atmospheres include: Chemistry reference conditions (STP); Diving and hyperbaric medicine; Physics gas-law calculations; Describing high-pressure environments.

A millimeter of mercury (mmHg) is a unit of pressure equal to the pressure exerted by a one-millimeter-high column of mercury, about 133.32 pascals. Derived from early mercury barometers, the mmHg is nearly identical to the torr. It remains the standard unit for blood pressure and other physiological measurements in medicine worldwide.

Common uses of millimeters of mercury include: Blood pressure readings (systolic/diastolic); Intraocular and intracranial pressure; Barometric pressure in medicine; Vacuum and gas-pressure measurement.

Here are some common values converted:

1 atm = 759.999892 mmHg 5 atm = 3,799.9995 mmHg 10 atm = 7,599.9989 mmHg 50 atm = 37,999.9946 mmHg 100 atm = 75,999.9892 mmHg