›› Convert pound/square inch to millimeter of mercury [0 °C]


The above form works if you are measuring differential pressure, such as the difference in psi between two points. It also gives the correct answer for absolute pressure, assuming you are measuring psia, which is the pressure relative to absolute zero vacuum.

If you are measuring relative to vacuum and want to resolve the pressure relative to the atmosphere, then you should use the form below.

psi (relative to atmosphere)
mmHg (relative to vacuum)

›› More information from the unit converter

How many psi in 1 mmHg? The answer is 0.019336777871316.
We assume you are converting between pound/square inch and millimeter of mercury [0 °C].
You can view more details on each measurement unit:
psi or mmHg
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.00014503773800722 psi, or 0.0075006156130264 mmHg.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between pounds/square inch and millimeters of mercury.
Type in your own numbers in the form to convert the units!

›› Quick conversion chart of psi to mmHg

1 psi to mmHg = 51.71492 mmHg

2 psi to mmHg = 103.42985 mmHg

3 psi to mmHg = 155.14477 mmHg

4 psi to mmHg = 206.8597 mmHg

5 psi to mmHg = 258.57462 mmHg

6 psi to mmHg = 310.28954 mmHg

7 psi to mmHg = 362.00447 mmHg

8 psi to mmHg = 413.71939 mmHg

9 psi to mmHg = 465.43432 mmHg

10 psi to mmHg = 517.14924 mmHg

›› Want other units?

You can do the reverse unit conversion from mmHg to psi, or enter any two units below:

Enter two units to convert


›› Common pressure conversions

psi to kip/square inch
psi to kilogram/square centimeter
psi to foot of air
psi to centimeter water
psi to hectobar
psi to zettapascal
psi to micropascal
psi to millihg
psi to inch water
psi to kip/square foot

›› Definition: Pound/square inch

The pound per square inch or, more accurately, pound-force per square inch (symbol: psi or lbf/inē or lbf/inē) is a unit of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force of one pound-force applied to an area of one square inch.

›› Definition: Millimeter of mercury

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.

›› Metric conversions and more

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!