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


pound/square inch
millimeters mercury

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.

pound/square inch (relative to atmosphere)
millimeters mercury (relative to vacuum)



Did you mean to convert pound/square inch
pound/square inch [gauge]
pound/square inch [absolute]
 to millimeters mercury

More information from the unit converter

How many pound/square inch in 1 millimeters mercury? The answer is 0.019336777496394. We assume you are converting between pound/square inch and millimeter mercury [0 °C]. You can view more details on each measurement unit: pound/square inch or millimeters mercury The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00014503773800722 pound/square inch, or 0.0075006157584566 millimeters mercury. 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 mercury. Type in your own numbers in the form to convert the units!



Quick conversion chart of pound/square inch to millimeters mercury

1 pound/square inch to millimeters mercury = 51.71493 millimeters mercury

2 pound/square inch to millimeters mercury = 103.42985 millimeters mercury

3 pound/square inch to millimeters mercury = 155.14478 millimeters mercury

4 pound/square inch to millimeters mercury = 206.8597 millimeters mercury

5 pound/square inch to millimeters mercury = 258.57463 millimeters mercury

6 pound/square inch to millimeters mercury = 310.28955 millimeters mercury

7 pound/square inch to millimeters mercury = 362.00448 millimeters mercury

8 pound/square inch to millimeters mercury = 413.7194 millimeters mercury

9 pound/square inch to millimeters mercury = 465.43433 millimeters mercury

10 pound/square inch to millimeters mercury = 517.14925 millimeters mercury


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You can do the reverse unit conversion from millimeters mercury to pound/square inch, or enter any two units below:

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Common pressure conversions


Definition: Pound/square inch

The pound per square inch or, more accurately, pound-force per square inch (symbol: psi or lbf/in² or lbf/in²) 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 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.


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!