Convert Hectopascals to Gigapascals
Convert Hectopascals (hPa) to Gigapascals (GPa) instantly and accurately.
Conversion Formula
GPa = hPa × 1.000000000e-7
About Hectopascals
A hectopascal (hPa) = 100 Pa = 1 mbar - the WMO-official SI-compatible meteorological pressure unit since 1986, replacing millibar with no numerical change. All modern surface observations (METAR, SYNOP), digital barometers, aviation weather, and weather apps report in hPa. QNH altimeter settings outside North America are in hPa. ICAO standard sea-level pressure is 1013.25 hPa. Continental high-pressure record exceeds 1084 hPa; Typhoon Tip (1979) holds the low record at ~870 hPa. 1 hPa = 100 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
| Hectopascals (hPa) | Gigapascals (GPa) |
|---|---|
| 1 hPa | 1 × 10-7 GPa |
| 2 hPa | 2 × 10-7 GPa |
| 5 hPa | 5 × 10-7 GPa |
| 10 hPa | 1 × 10-6 GPa |
| 25 hPa | 2.5 × 10-6 GPa |
| 50 hPa | 5 × 10-6 GPa |
| 100 hPa | 1 × 10-5 GPa |