Inches of mercury (inHg) to Millibar (mbar) Conversion
Inches of mercury
The inch of mercury (inHg) is a unit of pressure equal to the pressure exerted by a column of mercury 1 inch (25.4 mm) high — approximately 3,386.39 Pa or 0.0334 atm. It is used in US aviation for altimeter settings (standard pressure is 29.92 inHg) and in US weather reports for barometric pressure. Pilots set their altimeters in inHg based on local barometric pressure to ensure accurate altitude readings.
Millibar
The millibar (mbar) is a unit of pressure equal to one thousandth of a bar (100 Pa). It is the standard unit for atmospheric pressure in meteorology: standard atmospheric pressure is 1,013.25 mbar, and weather maps plot isobars (lines of equal pressure) in millibars or hectopascals (1 hPa = 1 mbar). The eye of a powerful hurricane can have a central pressure below 900 mbar, while high-pressure systems typically exceed 1,020 mbar.
| Inches of mercury (inHg) | Millibar (mbar) |
|---|---|
| 0.1 inHg | 3.3864 mbar |
| 1 inHg | 33.8639 mbar |
| 2 inHg | 67.7278 mbar |
| 3 inHg | 101.5917 mbar |
| 5 inHg | 169.3194 mbar |
| 10 inHg | 338.6389 mbar |
| 20 inHg | 677.2777 mbar |
| 30 inHg | 1,015.9166 mbar |
| 50 inHg | 1,693.1943 mbar |
| 100 inHg | 3,386.3886 mbar |
| 1000 inHg | 33,863.8864 mbar |
Frequently Asked Questions (FAQ)
How many millibar are in 1 inches of mercury?
1 inches of mercury (inHg) is exactly 33.864 millibar (mbar).
How do I convert inches of mercury to millibar?
Multiply the value in inches of mercury by 33.864 to get the result in millibar. Or use the converter above — type any number and see the result instantly.