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

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


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.

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.

How to Convert Millimeters Of Mercury to Pounds Per Square Inches

Example: How many pounds per square inches are equivalent to 18.47 Millimeters of Mercury?


1 Millimeters of Mercury = 0.019337 pounds per square inches

18.47 Millimeters of Mercury = Y pounds per square inches

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

Y equals 18.47 times 0.019337 over 1

(i.e.) Y = 18.47 * 0.019337 / 1 = 0.35715439 pounds per square inches

Answer is: 0.35715439 pounds per square inches are equivalent to 18.47 Millimeters of Mercury.

Practice Question: Convert the following units into psi:

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

( i ) 8.8 mm hg

( ii ) 9.88 mm hg

( iii ) 95.72 mm hg

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  • USMA
  • NIST

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