Convert Pound Per Square Inch to Millimeter Of Mercury (psi to mm hg)

In next fields, kindly type your value in the text box under title [ From: ] to convert from pound per square inch to Millimeter of Mercury (psi to mm hg). As you type your value, the answer will be automatically calculated and displayed in the text box under title [ To: ].


Pound Per Square Inch (abbreviations: psi, or lb/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.

Millimeter Of Mercury (abbreviations: mm Hg, or mmHg): is a manometric unit of pressure, equal to 133.322387415 pascals. It is the extra pressure generated by a column of mercury of one millimeter high.

How to Convert Pounds Per Square Inches to Millimeters Of Mercury

Example: How many Millimeters of Mercury are equivalent to 99.77 pounds per square inches?


1 pounds per square inches = 51.71379 Millimeters of Mercury

99.77 pounds per square inches = Y Millimeters of Mercury

Assuming Y is the answer, and by criss-cross principle;

Y equals 99.77 times 51.71379 over 1

(i.e.) Y = 99.77 * 51.71379 / 1 = 5159.4848283 Millimeters of Mercury

Answer is: 5159.4848283 Millimeters of Mercury are equivalent to 99.77 pounds per square inches.

Practice Question: Convert the following units into mm hg:

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 6.87 psi

( ii ) 52.37 psi

( iii ) 19.05 psi

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  • USMA
  • NIST

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