**Definitions:**

**Atmosphere** (abbreviation: **atm**): is a unit of standard pressure, equal to 101325 Pa, or 1.01325 bar.

**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 Atmospheres to Pounds Per Square Inches

*Example: How many pounds per square inches are equivalent to 4.47 Atmospheres?*

As;

1 Atmospheres = 14.69181 pounds per square inches

4.47 Atmospheres = Y pounds per square inches

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

Y equals 4.47 times 14.69181 over 1

(i.e.) Y = 4.47 * 14.69181 / 1 = 65.6723907 pounds per square inches

Answer is: 65.6723907 pounds per square inches are equivalent to 4.47 Atmospheres.

*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 ) 41.92 atm

( ii ) 30.53 atm

( iii ) 44.8 atm