inH2O to inHg converter
1 inH2O = 0.0735539 inHg
And 1 inHg = 13.5955 inH2O. Inches of water column to inches of mercury.
Formula
inHg = inH2O × 0.0735539
A reading of 15 inH2O is 15 × 0.0735539 = 1.10331 inHg.
inH2O to inHg table
| inH2O | inHg |
|---|---|
| 1 inH2O | 0.0735539 inHg |
| 5 inH2O | 0.367769 inHg |
| 10 inH2O | 0.735539 inHg |
| 15 inH2O | 1.10331 inHg |
| 30 inH2O | 2.20662 inHg |
| 50 inH2O | 3.67769 inHg |
| 100 inH2O | 7.35539 inHg |
| 500 inH2O | 36.7769 inHg |
| 1,000 inH2O | 73.5539 inHg |
inHg to inH2O table
| inHg | inH2O |
|---|---|
| 1 inHg | 13.5955 inH2O |
| 5 inHg | 67.9774 inH2O |
| 10 inHg | 135.955 inH2O |
| 15 inHg | 203.932 inH2O |
| 30 inHg | 407.864 inH2O |
| 50 inHg | 679.774 inH2O |
About these units
inH2O (inches of water column): Low duct and furnace pressures, at the conventional 4 °C water reference.
inHg (inches of mercury): Barometric pressure in US aviation and weather reports.
Gauge pressure (psig, barg) is measured relative to the surrounding atmosphere; absolute pressure (psia, bara) is relative to vacuum. Converting units never changes that reference: absolute = gauge + about 14.696 psi (1.01325 bar) at sea level. Stress uses the same units: 1 MPa = 1 N/mm².
Convert inHg to inH2O instead · All pressure and stress conversions