Convert pressure units — pascal, PSI, bar, atmosphere, torr, mmHg and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 mbar | 1e-06 bar | |
| 0.01 mbar | 1e-05 bar | |
| 0.1 mbar | 0.0001 bar | |
| 1 mbar | 0.001 bar | |
| 5 mbar | 0.005 bar | |
| 10 mbar | 0.01 bar | |
| 50 mbar | 0.05 bar | |
| 100 mbar | 0.1 bar | |
| 1000 mbar | 1 bar |
Formula: Bar = Millibar × 0.001
Multiply any millibar value by 0.001 to get bar.
Reverse: Millibar = Bar × 1000
Common millibar values — factor: 1 mbar = 0.001 bar
| Millibar (mbar) | Bar (bar) | Context |
|---|---|---|
| 1 mbar | 0.001 bar | 0.1 kPa / light wind |
| 10 mbar | 0.01 bar | 1 kPa |
| 100 mbar | 0.1 bar | 10 kPa |
| 500 mbar | 0.5 bar | 0.5 bar |
| 1,013 mbar | 1.013 bar | 1 atm / sea level |
| 2,000 mbar | 2 bar | 2 bar |
| 5,000 mbar | 5 bar | 5 bar |
| 1e+04 mbar | 10 bar | 10 bar |
| 100,000 mbar | 100 bar | 100 bar |
| 1,000,000 mbar | 1,000 bar | 1,000 bar |
| 68.95 mbar | 0.06895 bar | 1 psi |
| 1.333 mbar | 0.001333 bar | 1 mmHg |
| 33.86 mbar | 0.03386 bar | 1 inHg |
| 980.7 mbar | 0.9807 bar | 1 kgf/cm² |
| 10,000,000 mbar | 1e+04 bar | 10,000 bar |
1 mbar = 0.001 bar. Memorize for instant estimates.
Use 0.001 as a quick mental multiplier.
Multiply result by 1000 to recover the original mbar value.
Monitors dive cylinder pressure in bar — standard in most of the world (200–300 bar).
Reads surface pressure maps in millibar (1 mbar = 0.001 bar) for weather forecasting.
Designs European hydraulic systems — pumps and actuators are rated in bar.
Controls fermentation vessel pressure (1–3 bar) and carbonation pressures in bar.
Specifies pipeline operating pressures and safety relief settings in bar.
Monitors tire pressure and boost pressure on turbocharged engines in bar.
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.
The bar is a metric unit of pressure equal to exactly 100,000 pascals — very close to standard atmospheric pressure (1 atm = 1.01325 bar). It was introduced in 1909 and is widely used in Europe for weather forecasting, diving, and industrial applications.
Scuba diving cylinders are filled to 200–300 bar. Automotive tire pressure gauges often display in bar across Europe. Industrial compressors and hydraulic systems are commonly rated in bar.
Interesting fact: The millibar (mbar = hPa) is the standard unit for atmospheric pressure in meteorology worldwide. Standard sea-level atmospheric pressure is 1013.25 mbar.
Converting millibar to bar 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 = 0.005 bar and 10 mbar = 0.01 bar. For the reverse: 1 bar = 1000 mbar. The exact factor is 1 mbar = 0.001 bar.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.