Convert Millimeters of Water to Terapascals
Convert Millimeters of Water (mmH₂O) to Terapascals (TPa) instantly and accurately.
Conversion Formula
TPa = mmH₂O × 9.806650000e-12
About Millimeters of Water
One millimetre of water column (mmH₂O) = pressure from 1 mm of fresh water at standard gravity = exactly 9.80665 Pa. Preferred for very low differential pressures in HVAC: ductwork static pressures, fan curves, filter resistance, and building pressurisation are in mm WC. Gas valve operating pressures are typically 0.5-3 mm WC; clean-room cascade differentials 12-25 mm WC. A domestic gas hob manifold operates at ~20 mm WC on natural gas. Also used in spirometer calibration and hospital oxygen delivery systems. 1 mmH₂O = 9.80665 Pa.
About Terapascals
A terapascal (TPa) = 10¹² Pa = 10 Mbar - pressures in giant planet cores and at the frontier of high-energy-density physics. Jupiter's centre: ~40-70 TPa; Saturn's: ~10 TPa. Earth's inner core: ~0.35 TPa; core-mantle boundary: ~0.14 TPa. Laser-driven ramp and shock compression at NIF approaches TPa regimes for fusion implosion capsule research. Hydrogen is predicted to become a superconducting metal at ~0.5-5 TPa. Understanding TPa equations of state is critical for modelling exoplanet interiors. 1 TPa = 10¹² Pa.
Quick Reference Table
| Millimeters of Water (mmH₂O) | Terapascals (TPa) |
|---|---|
| 1 mmH₂O | 9.807 × 10-12 TPa |
| 2 mmH₂O | 1.961 × 10-11 TPa |
| 5 mmH₂O | 4.903 × 10-11 TPa |
| 10 mmH₂O | 9.807 × 10-11 TPa |
| 25 mmH₂O | 2.452 × 10-10 TPa |
| 50 mmH₂O | 4.903 × 10-10 TPa |
| 100 mmH₂O | 9.807 × 10-10 TPa |