Convert Megapascals to Millimeters of Water
Convert Megapascals (MPa) to Millimeters of Water (mmH₂O) instantly and accurately.
Conversion Formula
mmH₂O = MPa × 101971.6213
About Megapascals
A megapascal (MPa) = 10⁶ Pa = 10 bar - standard unit for mechanical stress, material strength, and high-pressure engineering. Structural material yield strengths: mild steel 250-550 MPa; high-strength steel to 2,000 MPa; carbon fibre composites 1,500-7,000 MPa tensile. Hydraulic press pressures 50-200 MPa. Mariana Trench floor ~110 MPa. Concrete compressive strength: 25-40 MPa (normal); up to 150 MPa (high-performance). Water-jet cutting: 200-600 MPa. Elastic moduli in FEM analysis are in MPa or GPa. 1 MPa = 10⁶ Pa = 145.0 psi.
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.
Quick Reference Table
| Megapascals (MPa) | Millimeters of Water (mmH₂O) |
|---|---|
| 1 MPa | 101972 mmH₂O |
| 2 MPa | 203943 mmH₂O |
| 5 MPa | 509858 mmH₂O |
| 10 MPa | 1019720 mmH₂O |
| 25 MPa | 2549290 mmH₂O |
| 50 MPa | 5098580 mmH₂O |
| 100 MPa | 10197200 mmH₂O |