How many mm Hg in 1 torr?
The answer is 0.9999998575337.
We assume you are converting between and torr.
You can view more details on each measurement unit:
mm Hg or torr
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.0075006157584566 mm Hg, or 0.0075006168270417 torr.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between millimeters mercury and torrs.
Type in your own numbers in the form to convert the units!
You can do the reverse unit conversion from torr to mm Hg, or enter any two units below:
The millimeter of mercury by definition is 133.322387415 Pa (13.5951 g/cm3 × 9.80665 m/s2 × 1 mm), which is approximated with known accuracies of density of mercury and standard gravity.
The torr is defined as 1/760 of one standard atmosphere, while the atmosphere is defined as 101325 pascals. Therefore, 1 Torr is equal to
101325/760 Pa. The decimal form of this fraction is approximately 133.322368421.
The relationship between the torr and the millimeter of mercury is:
1 Torr = 0.999999857533699 mmHg
1 mmHg = 1.000000142466321 Torr
The difference between one millimeter of mercury and one torr, as well as between one atmosphere (101.325 kPa) and 760 mmHg (101.3250144354 kPa), is less than one part in seven million (or less than 0.000015%). This small difference is negligible for most applications outside metrology.
The torr is a non-SI unit of pressure, named after Evangelista Torricelli. Its symbol is Torr.
ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!