## ››Convert torr to

 torr millimeter mercury

How many torr in 1 millimeter mercury? The answer is 1.0000001424663.
We assume you are converting between torr and .
You can view more details on each measurement unit:
torr or millimeter mercury
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.0075006168270417 torr, or 0.0075006157584566 millimeter mercury.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between torrs and millimeters mercury.
Type in your own numbers in the form to convert the units!

## ››Quick conversion chart of torr to millimeter mercury

1 torr to millimeter mercury = 1 millimeter mercury

5 torr to millimeter mercury = 5 millimeter mercury

10 torr to millimeter mercury = 10 millimeter mercury

20 torr to millimeter mercury = 20 millimeter mercury

30 torr to millimeter mercury = 30 millimeter mercury

40 torr to millimeter mercury = 39.99999 millimeter mercury

50 torr to millimeter mercury = 49.99999 millimeter mercury

75 torr to millimeter mercury = 74.99999 millimeter mercury

100 torr to millimeter mercury = 99.99999 millimeter mercury

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You can do the reverse unit conversion from millimeter mercury to torr, or enter any two units below:

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## ››Definition: Torr

The torr is a non-SI unit of pressure, named after Evangelista Torricelli. Its symbol is Torr.

## ››Definition: Millimeter mercury

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.

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