What is pound per square inch?

Pound per square inch (psi) is an imperial pressure unit widely used in the United States for tire inflation, hydraulic system pressures, gas cylinder ratings, and plumbing specifications.

What is atmosphere?

An atmosphere (atm) is a pressure unit equal to mean atmospheric pressure at sea level, approximately 101,325 pascals. It is used as a reference in chemistry, diving tables, and altitude calculations.

Worked examples

1 pound per square inch = 0.06804596 atmosphere

1 atmosphere = 101,325 pascal