Pound per Square Inch to Standard Atmosphere
Convert psi to atm instantly — free, no sign-up.
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About the Pound per Square Inch (psi)
The Pound per Square Inch is the standard pressure unit in the US for tire pressure, hydraulics, and plumbing specs.
About the Standard Atmosphere (atm)
The Standard Atmosphere is defined as exactly 101,325 pascals, representing average air pressure at sea level — used as a reference point across chemistry and engineering.
How to convert psi to atm
- Enter the value in psi in the box above.
- The atm equivalent updates instantly.
- Use the swap button to convert atm back to psi just as easily.