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


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

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.

millimeter mercury [0 °C] (relative to vacuum)
pound/square inch [gauge] (relative to atmosphere)



Did you mean to convert millimeter mercury [0 °C]
to pound/square inch
pound/square inch [gauge]
pound/square inch [absolute]

More information from the unit converter

How many millimeter mercury [0 °C] in 1 pound/square inch [gauge]? The answer is 51.714925105101. We assume you are converting between millimeter mercury [0 °C] and pound/square inch [gauge]. You can view more details on each measurement unit: millimeter mercury [0 °C] or pound/square inch [gauge] The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.0075006157584566 millimeter mercury [0 °C], or 0.00014503773800722 pound/square inch [gauge]. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between millimeters mercury and pounds/square inch. Type in your own numbers in the form to convert the units!



Quick conversion chart of millimeter mercury [0 °C] to pound/square inch [gauge]

1 millimeter mercury [0 °C] to pound/square inch [gauge] = 0.01934 pound/square inch [gauge]

10 millimeter mercury [0 °C] to pound/square inch [gauge] = 0.19337 pound/square inch [gauge]

20 millimeter mercury [0 °C] to pound/square inch [gauge] = 0.38674 pound/square inch [gauge]

30 millimeter mercury [0 °C] to pound/square inch [gauge] = 0.5801 pound/square inch [gauge]

40 millimeter mercury [0 °C] to pound/square inch [gauge] = 0.77347 pound/square inch [gauge]

50 millimeter mercury [0 °C] to pound/square inch [gauge] = 0.96684 pound/square inch [gauge]

100 millimeter mercury [0 °C] to pound/square inch [gauge] = 1.93368 pound/square inch [gauge]

200 millimeter mercury [0 °C] to pound/square inch [gauge] = 3.86736 pound/square inch [gauge]


Want other units?

You can do the reverse unit conversion from pound/square inch [gauge] to millimeter mercury [0 °C], or enter any two units below:

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Common pressure conversions


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.


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!