Convert Millimeters of Mercury to Nanopascals
Convert Millimeters of Mercury (mmHg) to Nanopascals (nPa) instantly and accurately.
Conversion Formula
nPa = mmHg × 133322387400
About Millimeters of Mercury
One millimetre of mercury (mmHg) = pressure from 1 mm of mercury at 0°C and standard gravity = 133.322 Pa. Clinical medicine worldwide uses mmHg for blood pressure (normal ~120/80 mmHg) and for gas partial pressures in physiology: arterial O₂ ~95-100 mmHg; CO₂ ~40 mmHg; alveolar O₂ ~104 mmHg. Ophthalmologists measure intraocular pressure in mmHg (normal 10-21; glaucoma risk above 21). Vacuum equipment ratings are also given in mmHg. 760 mmHg = 1 atm. 1 mmHg = 133.322 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
| Millimeters of Mercury (mmHg) | Nanopascals (nPa) |
|---|---|
| 1 mmHg | 1.333 × 1011 nPa |
| 2 mmHg | 2.666 × 1011 nPa |
| 5 mmHg | 6.666 × 1011 nPa |
| 10 mmHg | 1.333 × 1012 nPa |
| 25 mmHg | 3.333 × 1012 nPa |
| 50 mmHg | 6.666 × 1012 nPa |
| 100 mmHg | 1.333 × 1013 nPa |