Convert pressure units — pascal, PSI, bar, atmosphere, torr, mmHg and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 mbar | 0.000750064 mmHg | |
| 0.01 mbar | 0.00750064 mmHg | |
| 0.1 mbar | 0.0750064 mmHg | |
| 1 mbar | 0.750064 mmHg | |
| 5 mbar | 3.75032 mmHg | |
| 10 mbar | 7.50064 mmHg | |
| 50 mbar | 37.5032 mmHg | |
| 100 mbar | 75.0064 mmHg | |
| 1000 mbar | 750.064 mmHg |
Formula: mmHg = Millibar × 0.7501
Multiply any millibar value by 0.7501 to get mmhg.
Reverse: Millibar = mmHg × 1.333
Common millibar values — factor: 1 mbar = 0.7501 mmHg
| Millibar (mbar) | mmHg (mmHg) | Context |
|---|---|---|
| 1 mbar | 0.7501 mmHg | 0.1 kPa / light wind |
| 10 mbar | 7.501 mmHg | 1 kPa |
| 100 mbar | 75.01 mmHg | 10 kPa |
| 500 mbar | 375 mmHg | 0.5 bar |
| 1,013 mbar | 760 mmHg | 1 atm / sea level |
| 2,000 mbar | 1,500 mmHg | 2 bar |
| 5,000 mbar | 3,750 mmHg | 5 bar |
| 1e+04 mbar | 7,501 mmHg | 10 bar |
| 100,000 mbar | 7.501e+04 mmHg | 100 bar |
| 1,000,000 mbar | 750,100 mmHg | 1,000 bar |
| 68.95 mbar | 51.72 mmHg | 1 psi |
| 1.333 mbar | 0.9998 mmHg | 1 mmHg |
| 33.86 mbar | 25.4 mmHg | 1 inHg |
| 980.7 mbar | 735.6 mmHg | 1 kgf/cm² |
| 10,000,000 mbar | 7,501,000 mmHg | 10,000 bar |
1 mbar = 0.7501 mmHg. Memorize for instant estimates.
Use 0.7501 as a quick mental multiplier.
Multiply result by 1.333 to recover the original mbar value.
Measures and interprets blood pressure in mmHg — the global clinical standard.
Measures intraocular pressure in mmHg to screen for and manage glaucoma.
Monitors arterial blood pressure and ventilator settings in mmHg.
Specifies rough vacuum ranges in torr/mmHg for laboratory systems.
Measures pulmonary artery pressure and oxygen partial pressure in mmHg.
Quantifies gas partial pressures (O₂, CO₂) in blood and tissues in mmHg.
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.
Millimeters of mercury (mmHg) is the traditional medical pressure unit, defined as the pressure exerted by a 1 mm column of mercury at 0°C under standard gravity. It equals 133.322 Pa and is numerically identical to the torr.
Blood pressure is universally measured in mmHg worldwide: normal blood pressure is about 120/80 mmHg. Intraocular pressure (glaucoma screening) is measured in mmHg. Gas partial pressures in physiology are quoted in mmHg.
Interesting fact: The sphygmomanometer (blood pressure cuff) still uses mmHg more than 130 years after its invention, making mmHg one of the most clinically important pressure units despite not being an SI unit.
Converting millibar to mmhg 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 = 3.75 mmHg and 10 mbar = 7.501 mmHg. For the reverse: 1 mmHg = 1.333 mbar. The exact factor is 1 mbar = 0.7501 mmHg.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.