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millimeter mercury | to |
atmosphere [standard] atmosphere [technical] |

How many millimeter mercury in 1 atmosphere?
The answer is 759.99989172561.

We assume you are converting between and **atmosphere [standard]**.

You can view more details on each measurement unit:

millimeter mercury or
atmosphere

The SI derived unit for **pressure** is the pascal.

1 pascal is equal to 0.0075006157584566 millimeter mercury, or 9.8692326671601E-6 atmosphere.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between millimeters mercury and atmospheres.

Type in your own numbers in the form to convert the units!

1 millimeter mercury to atmosphere = 0.00132 atmosphere

10 millimeter mercury to atmosphere = 0.01316 atmosphere

50 millimeter mercury to atmosphere = 0.06579 atmosphere

100 millimeter mercury to atmosphere = 0.13158 atmosphere

200 millimeter mercury to atmosphere = 0.26316 atmosphere

500 millimeter mercury to atmosphere = 0.65789 atmosphere

1000 millimeter mercury to atmosphere = 1.31579 atmosphere

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

millimeter mercury to ounce/square inch

millimeter mercury to kilobar

millimeter mercury to foot of head

millimeter mercury to pieze

millimeter mercury to foot of water

millimeter mercury to centimeter of mercury

millimeter mercury to petapascal

millimeter mercury to exabar

millimeter mercury to femtopascal

millimeter mercury to bar

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 standard atmosphere (symbol: atm) is a unit of pressure defined as 101325 Pa (1.01325 bar). It is sometimes used as a reference pressure or standard pressure. It is approximately equal to Earth's atmospheric pressure at sea level.

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