Millibar (mbar) to Inches of mercury (inHg) Conversion
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
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 (mbar) | Inches of mercury (inHg) |
|---|---|
| 0.1 mbar | 0.00295 inHg |
| 1 mbar | 0.0295 inHg |
| 2 mbar | 0.0591 inHg |
| 3 mbar | 0.0886 inHg |
| 5 mbar | 0.1476 inHg |
| 10 mbar | 0.2953 inHg |
| 20 mbar | 0.5906 inHg |
| 30 mbar | 0.8859 inHg |
| 50 mbar | 1.4765 inHg |
| 100 mbar | 2.953 inHg |
| 1000 mbar | 29.53 inHg |
Frequently Asked Questions (FAQ)
How many inches of mercury are in 1 millibar?
1 millibar (mbar) is exactly 0.02953 inches of mercury (inHg).
How do I convert millibar to inches of mercury?
Multiply the value in millibar by 0.02953 to get the result in inches of mercury. Or use the converter above — type any number and see the result instantly.