PSI to Atmosphere Converter

Instant, two-way conversion across common engineering units.

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1 psi = 0.068045964 atm(Pounds per square inchAtmosphere)

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Converting pounds per square inch to standard atmospheres

To convert pounds per square inch to standard atmospheres, multiply the value by 0.068045964. Pressure conversions link structural loading, material strength grades and mechanical system ratings across metric and US practice.

PSI (psi)

Pounds per square inch (psi) is the pressure unit of US customary engineering.

Origin
Derived from the avoirdupois pound-force acting on one square inch.
Where it is used
Used for piping, pneumatics, hydraulic systems and US material strengths.
Relation to SI
1 psi = 6,894.757 Pa, about 6.895 kPa.

Atmosphere (atm)

The standard atmosphere (atm) represents average air pressure at sea level.

Origin
Defined by convention as exactly 101,325 Pa.
Where it is used
Used as a reference in physics, gas calculations and equipment ratings.
Relation to SI
1 atm = 101,325 Pa = 1.01325 bar.

Frequently asked questions

How many standard atmospheres are in one pound per square inch?

1 psi equals 0.068045964 atm.

How do I convert pounds per square inch to standard atmospheres?

Multiply the value by 0.068045964. For example, 10 psi equals 0.68045964 atm.

How do I convert back from standard atmospheres to pounds per square inch?

1 atm equals 14.695949 psi. The converter above works in both directions, so you can type into either field.

How does pressure relate to structural loading?

One kilopascal equals one kilonewton per square meter, which is why imposed floor loads and wind pressures are stated in kPa or kN/m².

Why are concrete and steel grades given in MPa?

One megapascal equals one newton per square millimeter, which matches the millimeter cross-sections used in structural design, so C30/37 or S355 read directly as stress limits.

Is this pressure converter free to use?

Yes. Every unit conversion runs in your browser, needs no account and is free for professional use.

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