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atmosphere [standard] atmosphere [technical] |

How many mm of mercury in 1 atm?
The answer is 759.99995199606.

We assume you are converting between **millimeter of mercury [0 °C]** and **atmosphere [standard]**.

You can view more details on each measurement unit:

mm of mercury or
atm

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

1 pascal is equal to 0.0075006156130264 mm of mercury, or 9.8692316931427E-6 atm.

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

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

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

You can do the reverse unit conversion from atm to mm of mercury, or enter any two units below:

The torr (symbol: Torr) or millimetre of mercury (mmHg) is a non-SI unit of pressure. It is the atmospheric pressure that supports a column of mercury 1 millimetre high. The unit is named after Evangelista Torricelli, Italian physicist and mathematician, for his discovery of the principle of the barometer in 1643.

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