**Definitions:**

**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?*

As;

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