Convert Inches of Mercury to Pascals
Convert Inches of Mercury (inHg) to Pascals (Pa) instantly and accurately.
Conversion Formula
Pa = inHg × 3386.38864
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.
About Pascals
The pascal (Pa) is the SI unit of pressure - 1 N/m², named after Blaise Pascal (1623-1662). Standard sea-level atmosphere ≈ 101,325 Pa. One pascal is very small: roughly the pressure of a single banknote lying flat. Pascal is simultaneously the SI unit for mechanical stress and elastic modulus: structural steel Young's modulus ~200 GPa; rubber shear modulus ~0.5 MPa. Used universally in fluid mechanics, acoustics, atmospheric science, and materials engineering. 1 Pa = 1 N/m².
Quick Reference Table
| Inches of Mercury (inHg) | Pascals (Pa) |
|---|---|
| 1 inHg | 3386.39 Pa |
| 2 inHg | 6772.78 Pa |
| 5 inHg | 16931.9 Pa |
| 10 inHg | 33863.9 Pa |
| 25 inHg | 84659.7 Pa |
| 50 inHg | 169319 Pa |
| 100 inHg | 338639 Pa |