Convert Millibars to Inches of Mercury
Convert Millibars (mbar) to Inches of Mercury (inHg) instantly and accurately.
Conversion Formula
inHg = mbar × 0.0295299833
About Millibars
A millibar (mbar) = 100 Pa = 1 hPa - the historically dominant meteorological pressure unit. Standard sea-level pressure is 1013.25 mbar. Hurricane intensity is characterised by central pressure: Category 5 storms typically below 920 mbar (US record: 892 mbar, 1935). Upper-air analysis levels - 850, 700, 500, 300, 200 mbar - appear throughout decades of archived meteorological data. Aircraft cabins are pressurised to ~750-800 mbar at cruise altitude. 'Weather bombs' see pressure fall 24+ mbar in 24 hours. 1 mbar = 100 Pa.
About Inches of Mercury
One inch of mercury (inHg) ≈ 3,386 Pa - the primary barometric pressure unit in US aviation and meteorology. ASOS weather stations, METARs, and altimeter settings in the US report in inHg. Standard sea-level pressure is 29.92 inHg. Altimeters are set to local QNH in inHg to maintain altitude reference. US barometers for home weather stations display inHg. Typical pressure range: 28.5-31.0 inHg in continental weather systems. Record low: ~25.70 inHg (Typhoon Tip, 1979). 1 inHg = 3,386.39 Pa.
Quick Reference Table
| Millibars (mbar) | Inches of Mercury (inHg) |
|---|---|
| 1 mbar | 0.02953 inHg |
| 2 mbar | 0.05906 inHg |
| 5 mbar | 0.14765 inHg |
| 10 mbar | 0.2953 inHg |
| 25 mbar | 0.73825 inHg |
| 50 mbar | 1.4765 inHg |
| 100 mbar | 2.953 inHg |