Convert Pound Per Square Inch to Atmosphere (psi to atm)

In next fields, kindly type your value in the text box under title [ From: ] to convert from pound per square inch to Atmosphere (psi to atm). 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.

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

How to Convert Pounds Per Square Inches to Atmospheres

Example: How many Atmospheres are equivalent to 77.79 pounds per square inches?


1 pounds per square inches = 0.068065 Atmospheres

77.79 pounds per square inches = Y Atmospheres

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

Y equals 77.79 times 0.068065 over 1

(i.e.) Y = 77.79 * 0.068065 / 1 = 5.29477635 Atmospheres

Answer is: 5.29477635 Atmospheres are equivalent to 77.79 pounds per square inches.

Practice Question: Convert the following units into atm:

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

( i ) 0.07 psi

( ii ) 44.62 psi

( iii ) 29.22 psi

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  • USMA
  • NIST

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