Millibar (mbar)
The millibar is one thousandth of a bar and is often used in meteorology for atmospheric pressure.
History: the millibar became popular in meteorology because atmospheric pressure is conveniently near 1000 mbar.
Quickly convert millibars to PSI without lookup tables or manual math.
This page is focused on converting millibars to PSI. Type a number into the first field and the result appears immediately in the second field.
Example: 1 mbar = 0.0145037738 psi. Conversion formula: result = value × 100 / 6894.757293168.
Use this converter for everyday calculations, study notes, engineering checks, and quick value verification without installing a separate app.
The millibar is one thousandth of a bar and is often used in meteorology for atmospheric pressure.
History: the millibar became popular in meteorology because atmospheric pressure is conveniently near 1000 mbar.
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.
Enter a value in the Millibar field. The converter applies the formula "result = value × 100 / 6894.757293168" and immediately shows the result in PSI.
1 mbar = 0.0145037738 psi.
Yes. Use the swap button or choose the reverse pair from the full conversion list.