Atmospheres to Millimeters of mercury converter

To convert atmospheres to millimeters of mercury, enter the value in the first field. The result in millimeters of mercury is calculated automatically using the exact conversion factor.

1 atm ≈ 759.999891726 mmHg
1 mmHg ≈ 0.00131578966114 atm

Formula: mmHg ≈ atm × 759.999891726
atm ≈ mmHg × 0.00131578966114

Definitions: 1 atm = 101325 Pa; 1 mmHg = 133.322387415 Pa

The standard atmosphere (atm) is exactly 101,325 pascals, the average air pressure at sea level. It is a reference pressure in chemistry and physics and is used to express high pressures as multiples of atmospheric pressure.

The millimeter of mercury (mmHg) is the pressure at the base of a one-millimeter column of mercury. It is the unit of blood pressure in medicine, for example 120/80 mmHg, and is also used for some barometric and vacuum readings.

See the conversion table with commonly used values, handy for quick reference or study.