Convert pressure units — pascal, PSI, bar, atmosphere, torr, mmHg and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 mbar | 2.953e-05 inHg | |
| 0.01 mbar | 0.0002953 inHg | |
| 0.1 mbar | 0.002953 inHg | |
| 1 mbar | 0.02953 inHg | |
| 5 mbar | 0.14765 inHg | |
| 10 mbar | 0.2953 inHg | |
| 50 mbar | 1.4765 inHg | |
| 100 mbar | 2.953 inHg | |
| 1000 mbar | 29.53 inHg |
Formula: Inch Hg = Millibar × 0.02953
Multiply any millibar value by 0.02953 to get inch hg.
Reverse: Millibar = Inch Hg × 33.86
Common millibar values — factor: 1 mbar = 0.02953 inHg
| Millibar (mbar) | Inch Hg (inHg) | Context |
|---|---|---|
| 1 mbar | 0.02953 inHg | 0.1 kPa / light wind |
| 10 mbar | 0.2953 inHg | 1 kPa |
| 100 mbar | 2.953 inHg | 10 kPa |
| 500 mbar | 14.76 inHg | 0.5 bar |
| 1,013 mbar | 29.92 inHg | 1 atm / sea level |
| 2,000 mbar | 59.06 inHg | 2 bar |
| 5,000 mbar | 147.6 inHg | 5 bar |
| 1e+04 mbar | 295.3 inHg | 10 bar |
| 100,000 mbar | 2,953 inHg | 100 bar |
| 1,000,000 mbar | 2.953e+04 inHg | 1,000 bar |
| 68.95 mbar | 2.036 inHg | 1 psi |
| 1.333 mbar | 0.03936 inHg | 1 mmHg |
| 33.86 mbar | 0.9999 inHg | 1 inHg |
| 980.7 mbar | 28.96 inHg | 1 kgf/cm² |
| 10,000,000 mbar | 295,300 inHg | 10,000 bar |
1 mbar = 0.02953 inHg. Memorize for instant estimates.
Use 0.0295 as a quick mental multiplier.
Multiply result by 33.86 to recover the original mbar value.
Sets altimeter QNH and reads weather ATIS in inHg — standard US aviation.
Reports barometric pressure in inHg for US television and radio weather.
Measures duct static pressure in inches of water column or inHg in US systems.
Checks HVAC system static pressure and duct leakage in inHg.
Logs surface pressure in inHg for propagation prediction and wx stations.
References inHg barometric pressure when using US-spec nautical instruments.
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.
Inches of mercury (inHg) is the pressure unit used in US aviation and weather reporting, defined as the pressure exerted by a 1-inch column of mercury (3,386.39 Pa). It has been standard in US aviation since the early 20th century.
US aviation altimeters are set in inHg (standard: 29.92 inHg). US weather broadcasts report barometric pressure in inHg. HVAC engineers in the US use inHg for duct static pressure measurements.
Interesting fact: Pilots set their altimeter to the local QNH (pressure at sea level) in inHg to ensure their altitude reading is accurate — a difference of 0.1 inHg causes an altimeter error of about 100 feet.
Converting millibar to inch hg 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 = 0.1476 inHg and 10 mbar = 0.2953 inHg. For the reverse: 1 inHg = 33.86 mbar. The exact factor is 1 mbar = 0.02953 inHg.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.