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


mmhg
psig

The above form works if you are measuring differential pressure, such as the difference in psi between two points.

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

Note that psig can measure differential pressure in some applications and absolute pressure in others, so you need to know which one fits your calculation.

mmhg (relative to vacuum)
psig (relative to atmosphere)



More information from the unit converter

How many mmhg in 1 psig? The answer is 51.714924102396. We assume you are converting between millimeter of mercury [0 °C] and pound/square inch [gauge]. You can view more details on each measurement unit: mmhg or psig The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.0075006156130264 mmhg, or 0.00014503773800722 psig. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between millimeters of mercury and pounds/square inch. Type in your own numbers in the form to convert the units!



Quick conversion chart of mmhg to psig

1 mmhg to psig = 0.01934 psig

10 mmhg to psig = 0.19337 psig

20 mmhg to psig = 0.38674 psig

30 mmhg to psig = 0.5801 psig

40 mmhg to psig = 0.77347 psig

50 mmhg to psig = 0.96684 psig

100 mmhg to psig = 1.93368 psig

200 mmhg to psig = 3.86736 psig


Want other units?

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

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Common pressure conversions


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.


Definition: Pound/square inch

Psig (pound-force per square inch gauge) is a unit of pressure relative to the surrounding atmosphere. By contrast, psia measures pressure relative to a vacuum (such as that in space). At sea level, Earth's atmosphere actually exerts a pressure of 14.7 psi. Humans do not feel this pressure because internal pressure of liquid in their bodies matches the external pressure. If a pressure gauge is calibrated to read zero in space, then at sea level on Earth it would read 14.7 psi. Thus a reading of 30 psig on a tire gauge represents an absolute pressure of 44.7 psi.


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, 70 kg, 150 lbs, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!