Pound per square inch (psi)
PSI means pound-force per square inch and is common for tires, pumps, and hydraulics.
History: PSI developed from imperial force and area units and settled in machinery, tires, and hydraulics.
Quickly convert PSI to atmospheres without lookup tables or manual math.
This page is focused on converting PSI to atmospheres. Type a number into the first field and the result appears immediately in the second field.
Example: 1 psi = 0.0680459639 atm. Conversion formula: result = value × 6894.757293168 / 101325.
Use this converter for everyday calculations, study notes, engineering checks, and quick value verification without installing a separate app.
PSI means pound-force per square inch and is common for tires, pumps, and hydraulics.
History: PSI developed from imperial force and area units and settled in machinery, tires, and hydraulics.
The atmosphere reflects approximate air pressure at sea level and is used as a practical pressure measure.
History: the standard atmosphere began as an approximation of mean air pressure at sea level.
Enter a value in the Pound per square inch field. The converter applies the formula "result = value × 6894.757293168 / 101325" and immediately shows the result in atmospheres.
1 psi = 0.0680459639 atm.
Yes. Use the swap button or choose the reverse pair from the full conversion list.