Convert Torr to Millimeters of Mercury (mmHg)
Enter a value below to convert Torr to Millimeters of Mercury (mmHg).
Conversion:
1 Torr = 1 Millimeters of Mercury (mmHg)
How to Convert Torr to Millimeters of Mercury (mmHg)
1 torr = 1 mmhg
1 mmhg = 1 torr
Example: convert 15 Torr to Millimeters of Mercury (mmHg):
25 torr = 25 mmhg
Torr to Millimeters of Mercury (mmHg) Conversion Table
| Torr | Millimeters of Mercury (mmHg) |
|---|---|
| 0.01 torr | 0.01 mmhg |
| 0.1 torr | 0.1 mmhg |
| 1 torr | 1 mmhg |
| 2 torr | 2 mmhg |
| 3 torr | 3 mmhg |
| 5 torr | 5 mmhg |
| 10 torr | 10 mmhg |
| 20 torr | 20 mmhg |
| 50 torr | 50 mmhg |
| 100 torr | 100 mmhg |
| 1000 torr | 1000 mmhg |
Torr
Definition
A torr is a unit of pressure equal to 1/760 of a standard atmosphere, or approximately 133.322 pascals. It is nearly equivalent to one millimeter of mercury (mmHg).
History
The torr was named after Evangelista Torricelli, the Italian physicist who invented the mercury barometer in 1644. It was defined to provide a convenient way to express vacuum and low-pressure measurements.
Current use
Torr is widely used in vacuum science, semiconductor manufacturing, and laboratory settings for measuring low pressures. It remains a standard unit in physics and materials processing.
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.