Pounds per Square Inch to Millimeters of Mercury Converter

To convert a measurement in pounds per square inch to millimeters of mercury, multiply the value by 51.714925. The conversion factor comes from the relationship between both units and the pascal.

For example, to convert 5 psi to millimeters of mercury: 5 × 51.714925 = 258.574626 mmHg.

Pounds per square inch (psi) is an imperial unit of pressure equal to the force of one pound-force applied to an area of one square inch, or about 6,894.76 pascals. Rooted in the imperial system, psi remains the dominant pressure unit in the United States. It appears on tire gauges, air compressors, and hydraulic equipment throughout North America.

Common uses of pounds per square inch include: Tire pressure in the United States; Air compressors and pneumatic tools; Hydraulic system ratings; Plumbing and water pressure specifications.

A millimeter of mercury (mmHg) is a unit of pressure equal to the pressure exerted by a one-millimeter-high column of mercury, about 133.32 pascals. Derived from early mercury barometers, the mmHg is nearly identical to the torr. It remains the standard unit for blood pressure and other physiological measurements in medicine worldwide.

Common uses of millimeters of mercury include: Blood pressure readings (systolic/diastolic); Intraocular and intracranial pressure; Barometric pressure in medicine; Vacuum and gas-pressure measurement.

Here are some common values converted:

1 psi = 51.714925 mmHg 5 psi = 258.574626 mmHg 10 psi = 517.149252 mmHg 50 psi = 2,585.7463 mmHg 100 psi = 5,171.4925 mmHg