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 | 0.0029529983301019 inHg |
| 1 mbar | 0.029529983301019 inHg |
| 2 mbar | 0.059059966602038 inHg |
| 3 mbar | 0.088589949903056 inHg |
| 5 mbar | 0.14764991650509 inHg |
| 10 mbar | 0.29529983301019 inHg |
| 20 mbar | 0.59059966602038 inHg |
| 30 mbar | 0.88589949903056 inHg |
| 50 mbar | 1.4764991650509 inHg |
| 100 mbar | 2.9529983301019 inHg |
| 1000 mbar | 29.529983301019 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.