Convert Atmospheres (atm) to Millimeters of Mercury (mmHg)
Enter a value below to convert Atmospheres (atm) to Millimeters of Mercury (mmHg).
Conversion:
1 Atmospheres (atm) = 760.00210018 Millimeters of Mercury (mmHg)
How to Convert Atmospheres (atm) to Millimeters of Mercury (mmHg)
1 atm = 760.00210018 mmhg
1 mmhg = 0.0013157858377 atm
Example: convert 15 Atmospheres (atm) to Millimeters of Mercury (mmHg):
25 atm = 19000.052504 mmhg
Atmospheres (atm) to Millimeters of Mercury (mmHg) Conversion Table
| Atmospheres (atm) | Millimeters of Mercury (mmHg) |
|---|---|
| 0.01 atm | 7.6000210018 mmhg |
| 0.1 atm | 76.000210018 mmhg |
| 1 atm | 760.00210018 mmhg |
| 2 atm | 1520.0042004 mmhg |
| 3 atm | 2280.0063005 mmhg |
| 5 atm | 3800.0105009 mmhg |
| 10 atm | 7600.0210018 mmhg |
| 20 atm | 15200.042004 mmhg |
| 50 atm | 38000.105009 mmhg |
| 100 atm | 76000.210018 mmhg |
| 1000 atm | 760002.10018 mmhg |
Atmospheres (atm)
Definition
A standard atmosphere (atm) is a unit of pressure defined as exactly 101,325 pascals. It represents the average atmospheric pressure at sea level.
History
The standard atmosphere was defined in 1954 as a reference standard for pressure. It was historically based on mercury barometer readings and the average weight of the Earth's atmosphere at sea level.
Current use
Atmospheres are used in chemistry (standard conditions for gas calculations), diving (dive depth pressure ratings), and as a reference point for comparing relative pressures across different systems.
Millimeters of Mercury (mmHg)
Definition
Millimeters of mercury (mmHg) is a unit of pressure based on the height of a mercury column, equal to approximately 133.322 pascals. It is nearly identical to the torr.
History
Millimeters of mercury originated from Torricelli's mercury barometer in the 17th century. Measuring pressure by mercury column height became the standard method for centuries and remains in medical practice.
Current use
mmHg is the standard unit for measuring blood pressure worldwide (e.g., 120/80 mmHg). It is also used in measuring intraocular pressure, cerebrospinal fluid pressure, and in some vacuum applications.