Convert Pascals to Inches of Mercury
Convert Pascals (Pa) to Inches of Mercury (inHg) instantly and accurately.
Conversion Formula
inHg = Pa × 0.000295299833
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.
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
| Pascals (Pa) | Inches of Mercury (inHg) |
|---|---|
| 1 Pa | 0.0002953 inHg |
| 2 Pa | 0.0005906 inHg |
| 5 Pa | 0.0014765 inHg |
| 10 Pa | 0.002953 inHg |
| 25 Pa | 0.0073825 inHg |
| 50 Pa | 0.014765 inHg |
| 100 Pa | 0.02953 inHg |