Convert pressure units — pascal, PSI, bar, atmosphere, torr, mmHg and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 mbar | 1.45038e-05 psi | |
| 0.01 mbar | 0.000145038 psi | |
| 0.1 mbar | 0.00145038 psi | |
| 1 mbar | 0.0145038 psi | |
| 5 mbar | 0.0725188 psi | |
| 10 mbar | 0.145038 psi | |
| 50 mbar | 0.725188 psi | |
| 100 mbar | 1.45038 psi | |
| 1000 mbar | 14.5038 psi |
Formula: PSI = Millibar × 0.0145
Multiply any millibar value by 0.0145 to get psi.
Reverse: Millibar = PSI × 68.95
Common millibar values — factor: 1 mbar = 0.0145 psi
| Millibar (mbar) | PSI (psi) | Context |
|---|---|---|
| 1 mbar | 0.0145 psi | 0.1 kPa / light wind |
| 10 mbar | 0.145 psi | 1 kPa |
| 100 mbar | 1.45 psi | 10 kPa |
| 500 mbar | 7.252 psi | 0.5 bar |
| 1,013 mbar | 14.7 psi | 1 atm / sea level |
| 2,000 mbar | 29.01 psi | 2 bar |
| 5,000 mbar | 72.52 psi | 5 bar |
| 1e+04 mbar | 145 psi | 10 bar |
| 100,000 mbar | 1,450 psi | 100 bar |
| 1,000,000 mbar | 1.45e+04 psi | 1,000 bar |
| 68.95 mbar | 1 psi | 1 psi |
| 1.333 mbar | 0.01933 psi | 1 mmHg |
| 33.86 mbar | 0.4911 psi | 1 inHg |
| 980.7 mbar | 14.22 psi | 1 kgf/cm² |
| 10,000,000 mbar | 145,000 psi | 10,000 bar |
1 mbar = 0.0145 psi. Memorize for instant estimates.
Use 0.0145 as a quick mental multiplier.
Multiply result by 68.95 to recover the original mbar value.
Inflates and checks car, truck, and bicycle tires to specified psi pressures.
Specifies refrigerant pressures and system test pressures in psi for US equipment.
Designs hydraulic systems rated in psi for American industrial machinery.
Monitors tank pressure (3,000 psi fill) and reserve pressure on US-spec gauges.
Specifies pipe pressure ratings and test pressures in psi for US plumbing codes.
Checks oil pressure (35–65 psi), coolant pressure, and brake line pressure in psi.
The millibar (mbar) equals 0.001 bar or 100 pascals, and is numerically identical to the hectopascal (hPa). It became the standard unit for surface pressure in international meteorology in the 20th century.
Weather maps and forecasts worldwide use millibars or hectopascals for surface pressure. Standard sea-level pressure is 1013.25 mbar. Hurricanes and typhoons are characterized by very low central pressures — Hurricane Patricia (2015) reached 872 mbar.
Interesting fact: A 1 mbar pressure difference over 111 km (1° latitude) drives a wind of approximately 1 m/s in mid-latitudes, which is why steep pressure gradients produce strong winds.
PSI (pounds per square inch) is the primary pressure unit in the United States, UK, and other countries using Imperial measures. It equals the force of one pound-force applied over one square inch of area (6,894.76 Pa).
PSI is used for tire pressure (car: 30–35 psi, truck: 80–120 psi), blood pressure measurement in the US, boiler pressure ratings, and hydraulic system specifications in American engineering.
Interesting fact: The deepest ocean dive by a human (Victor Vescovo, 2019, 10,928 m) would have experienced about 15,900 psi of external pressure on the submersible hull.
Converting millibar to psi is a common task in engineering, medicine, meteorology, and science. Different industries and countries use different pressure units — PSI in the US, bar in Europe, mmHg in medicine, and pascals in physics — making accurate conversion essential for cross-disciplinary work.
Quick reference: 5 mbar = 0.07252 psi and 10 mbar = 0.145 psi. For the reverse: 1 psi = 68.95 mbar. The exact factor is 1 mbar = 0.0145 psi.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.