Convert pressure units — pascal, PSI, bar, atmosphere, torr, mmHg and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 bar | 1 mbar | |
| 0.01 bar | 10 mbar | |
| 0.1 bar | 100 mbar | |
| 1 bar | 1000 mbar | |
| 5 bar | 5000 mbar | |
| 10 bar | 10000 mbar | |
| 50 bar | 50000 mbar | |
| 100 bar | 100000 mbar | |
| 1000 bar | 1e+06 mbar |
Formula: Millibar = Bar × 1000
Multiply any bar value by 1000 to get millibar.
Reverse: Bar = Millibar × 0.001
Common bar values — factor: 1 bar = 1000 mbar
| Bar (bar) | Millibar (mbar) | Context |
|---|---|---|
| 0.001 bar | 1 mbar | 0.1 kPa |
| 0.01 bar | 10 mbar | 1 kPa |
| 0.1 bar | 100 mbar | 10 kPa |
| 1 bar | 1,000 mbar | 100 kPa / ~1 atm |
| 1.013 bar | 1,013 mbar | 1 standard atm |
| 2 bar | 2,000 mbar | 29 psi / car tire |
| 5 bar | 5,000 mbar | 72 psi |
| 10 bar | 1e+04 mbar | 145 psi |
| 100 bar | 100,000 mbar | 1,450 psi |
| 200 bar | 200,000 mbar | Scuba tank |
| 300 bar | 300,000 mbar | High-pressure system |
| 500 bar | 500,000 mbar | 5,000 psi |
| 1,000 bar | 1,000,000 mbar | 10,000 psi |
| 0.06895 bar | 68.95 mbar | 1 psi |
| 0.001333 bar | 1.333 mbar | 1 mmHg |
1 bar = 1000 mbar. Memorize for instant estimates.
Use 1000 as a quick mental multiplier.
Multiply result by 0.001 to recover the original bar 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 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.
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.
Converting bar to millibar 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 bar = 5000 mbar and 10 bar = 1e+04 mbar. For the reverse: 1 mbar = 0.001 bar. The exact factor is 1 bar = 1000 mbar.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.