Convert Hectopascals to Nanopascals
Convert Hectopascals (hPa) to Nanopascals (nPa) instantly and accurately.
Conversion Formula
nPa = hPa × 100000000000
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 Nanopascals
A nanopascal (nPa) is 10⁻⁹ Pa - the pressure scale of deep interplanetary space. LIGO and Virgo gravitational wave detectors must isolate mirror displacement signals against noise floors in the nanopascal regime. Low Earth orbit residual atmosphere is ~100 µPa; deep interplanetary space is ~1-10 nPa depending on solar wind activity. Thermospheric gas layers above 200 km altitude fall into the nPa-µPa range. Casimir force calculations and quantum vacuum fluctuation modelling also operate at nanopascal scales. 1 nPa = 10⁻⁹ Pa.
Quick Reference Table
| Hectopascals (hPa) | Nanopascals (nPa) |
|---|---|
| 1 hPa | 1 × 1011 nPa |
| 2 hPa | 2 × 1011 nPa |
| 5 hPa | 5 × 1011 nPa |
| 10 hPa | 1 × 1012 nPa |
| 25 hPa | 2.5 × 1012 nPa |
| 50 hPa | 5 × 1012 nPa |
| 100 hPa | 1 × 1013 nPa |