Convert Nanopascals to Inches of Mercury
Convert Nanopascals (nPa) to Inches of Mercury (inHg) instantly and accurately.
Conversion Formula
inHg = nPa × 2.952998330e-13
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.
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
| Nanopascals (nPa) | Inches of Mercury (inHg) |
|---|---|
| 1 nPa | 2.953 × 10-13 inHg |
| 2 nPa | 5.906 × 10-13 inHg |
| 5 nPa | 1.476 × 10-12 inHg |
| 10 nPa | 2.953 × 10-12 inHg |
| 25 nPa | 7.382 × 10-12 inHg |
| 50 nPa | 1.476 × 10-11 inHg |
| 100 nPa | 2.953 × 10-11 inHg |