Convert Inches of Mercury to Gigapascals
Convert Inches of Mercury (inHg) to Gigapascals (GPa) instantly and accurately.
Conversion Formula
GPa = inHg × 3.386388640e-6
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 Gigapascals
A gigapascal (GPa) = 10⁹ Pa = 10 kbar - the extreme-pressure unit for materials science and planetary physics. Bulk moduli: fused silica 72 GPa; iron 170 GPa; diamond 442 GPa (highest known). Earth's inner core: 330-360 GPa. Jupiter's core: ~40,000-70,000 GPa. NIF laser-shocked experiments create 100-100,000 GPa to reproduce planetary interior conditions. Metallic hydrogen is predicted to form above ~500 GPa and has been tentatively observed at 400-500 GPa in diamond anvil cells. 1 GPa = 10⁹ Pa = 10 kbar.
Quick Reference Table
| Inches of Mercury (inHg) | Gigapascals (GPa) |
|---|---|
| 1 inHg | 3.386 × 10-6 GPa |
| 2 inHg | 6.773 × 10-6 GPa |
| 5 inHg | 1.693 × 10-5 GPa |
| 10 inHg | 3.386 × 10-5 GPa |
| 25 inHg | 8.466 × 10-5 GPa |
| 50 inHg | 0.000169319 GPa |
| 100 inHg | 0.000338639 GPa |