Millibar (mbar) to PSI Converter
Enter a value to instantly convert between pressure units.
1 Millibar = 0.0145 Pound per Sq. Inch
Key Formulas
Pound per Sq. Inch → Bar
bar = psi × 0.0689476Bar → Pound per Sq. Inch
psi = bar × 14.5038Atmosphere → Pound per Sq. Inch
psi = atm × 14.6959Pound per Sq. Inch → Atmosphere
atm = psi × 0.068046Formula
psi = mbar × 0.01450377One millibar equals 0.01450377 psi. Millibars are commonly used in meteorology for weather pressure reporting, while PSI dominates in North American industrial and automotive applications. Converting between them is essential when working with weather data in technical specifications or when cross-referencing international equipment manuals.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
Standard atmospheric pressure = 1013.25 mbar = 14.696 psi. The baseline for all pressure gauge readings worldwide.
1013.25 mbar = 14.696 psi
A meteorologist reporting 1000 mbar low-pressure system, equivalent to 14.5 psi below standard atmosphere.
1000 mbar = 14.504 psi
Hurricane pressure reading of 950 mbar in weather forecast = 13.78 psi, indicating severe storm conditions.
950 mbar = 13.779 psi
High-altitude measurement of 500 mbar (20,000 ft elevation) = 7.25 psi for aircraft cabin pressure calculations.
500 mbar = 7.252 psi