How to convert atmospheres to millimeters of mercury
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.
What is a atmosphere?
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.
What is a millimeter of mercury?
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.
Atmospheres to millimeters of mercury worked examples
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
Frequently asked questions
How many millimeters of mercury are in one atmosphere?
One atmosphere (atm) equals 759.999892 millimeters of mercury (mmHg). Multiply any value in atmospheres by 759.999892 to convert to millimeters of mercury.
How do I convert atmospheres to millimeters of mercury?
Multiply the value in atmospheres by 759.999892. For example, 5 atm × 759.999892 = 3,799.9995 mmHg.
How do I convert millimeters of mercury to atmospheres?
Multiply the value in millimeters of mercury by 0.001315789661, or divide by 759.999892. Use the swap button on the converter above to reverse the direction.
Is the atmosphere to millimeter of mercury conversion exact?
These conversions use standard SI-derived definitions. 1 atm = 101,325 Pa and 1 psi = 6,894.757 Pa exactly by definition.
What is the formula for atmospheres to millimeters of mercury?
The formula is: mmHg = atm × 759.999892. This comes from the definition of both units relative to the pascal.