Pounds per square inch to Millibars converter

To convert pounds per square inch to millibars, enter the value in the first field. The result in millibars is calculated automatically using the exact conversion factor.

1 psi ≈ 68.9475729317 mbar
1 mbar ≈ 0.014503773773 psi

Formula: mbar ≈ psi × 68.9475729317
psi ≈ mbar × 0.014503773773

Definitions: 1 psi = 8896443230521/1290320000 Pa; 1 mbar = 0.001 bar

The pound per square inch (psi) is the customary United States unit of pressure, one pound-force per square inch. It is used for tire pressure, air compressors and water and gas pressure in the United States, and for tires in the United Kingdom too.

The millibar (mbar) is one thousandth of a bar and equals exactly one hectopascal. It is the traditional unit for atmospheric pressure in meteorology and aviation, and it is common for vacuum pressures.

See the conversion table with commonly used values, handy for quick reference or study.