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Pressure

Convert millibars to psi

1 mbar=0.0145psi

Use the converter below to change any millibars value into psi instantly — with formula, conversion table, and real-world examples.

0.014504

Conversion formula

Forward
psi = millibars × 0.0145
Reverse
millibars = psi × 68.9476

Example: 10 mbar × 0.0145 = 0.145 psi.

About both units

From

Millibar

mbar

The millibar equals 100 pascals or 1/1000 bar. It is the traditional unit for atmospheric pressure in meteorology (now called hectopascal, hPa, but numerically identical). Sea-level pressure averages 1013 mbar.

Real-world: Sea-level average: 1013 mbar. Deep low-pressure storm: below 980 mbar. Hurricane eye: below 920 mbar.
Read full millibar reference →
To

Pound per Square Inch

psi

Pounds per square inch equals approximately 6895 Pa. It is the dominant pressure unit in the US — tyre pressures, plumbing, compressed air. Standard US tyre pressure: 32–35 psi.

Real-world: US tyre: 32–35 psi. Water supply: 40–60 psi. SCUBA tank: 3000 psi. Car AC system: 30–200 psi.
Read full pound per square inch reference →

Millibar to Pound per Square Inch conversion table

Common millibars to psi values for quick reference.

Millibar (mbar)Pound per Square Inch (psi)
1 mbar0.0145 psi
5 mbar0.07252 psi
10 mbar0.145 psi
25 mbar0.3626 psi
50 mbar0.7252 psi
100 mbar1.45038 psi
200 mbar2.90075 psi
500 mbar7.25189 psi
1,000 mbar14.5038 psi
5,000 mbar72.5189 psi

Tips & common mistakes

Quick tips

  • 1 mbar = 1 hPa = 100 Pa.
  • Weather reports: "1013 hPa" and "1013 mbar" mean the same thing.
  • Hurricane strength correlates with central pressure drop.

Avoid these

  • Confusing mbar and bar — 1000× difference.
  • Using mbar for industrial pressures — too small.
  • Mixing hPa and mbar in casual writing without noting they are equal.

Frequently asked questions

How many psi in a millibar?
One millibar equals 0.0145 psi.
How do I convert millibars to psi?
Multiply the millibar value by 0.0145 to get the equivalent in psi.
What is 100 millibars in psi?
100 millibars equals 1.45038 psi.
Is a millibar bigger than a pound per square inch?
No. 1 millibar equals 0.0145 psi, so one millibar is smaller.
How to convert millibars to psi without a calculator?
Multiply by 0.01 for a quick estimate; use a calculator for precise results.

Related pressure conversions

📊 See full comparison matrix →

More from Millibar

mbar → Pa
1 = 100 Pa
mbar → kPa
1 = 0.1 kPa
mbar → MPa
1 = 0.0001 MPa
mbar → bar
1 = 0.001 bar
mbar → atm
1 = 0.0009869 atm
mbar → mmHg
1 = 0.7501 mmHg
mbar → Torr
1 = 0.7501 Torr
mbar → inHg
1 = 0.02953 inHg

More to Pound per Square Inch

Pa → psi
1 = 0.000145 psi
kPa → psi
1 = 0.145 psi
MPa → psi
1 = 145.038 psi
bar → psi
1 = 14.5038 psi
atm → psi
1 = 14.6959 psi
mmHg → psi
1 = 0.01934 psi
Torr → psi
1 = 0.01934 psi
inHg → psi
1 = 0.4912 psi

Conversions in other categories

WeightKilogram → PoundLengthKilometer → MileTemperatureCelsius → FahrenheitVolumeLiter → US GallonAreaSquare Meter → Square FootSpeedKilometer per Hour → Mile per HourEnergyKilojoule → KilocaloriePowerKilowatt → Mechanical Horsepower