mmHg to inH2O converter
1 mmHg = 0.535255 inH2O
And 1 inH2O = 1.86827 mmHg. Millimetres of mercury to inches of water column.
Formula
inH2O = mmHg × 0.535255
A reading of 15 mmHg is 15 × 0.535255 = 8.02883 inH2O.
mmHg to inH2O table
| mmHg | inH2O |
|---|---|
| 1 mmHg | 0.535255 inH2O |
| 5 mmHg | 2.67628 inH2O |
| 10 mmHg | 5.35255 inH2O |
| 15 mmHg | 8.02883 inH2O |
| 30 mmHg | 16.0577 inH2O |
| 50 mmHg | 26.7628 inH2O |
| 100 mmHg | 53.5255 inH2O |
| 500 mmHg | 267.628 inH2O |
| 1,000 mmHg | 535.255 inH2O |
inH2O to mmHg table
| inH2O | mmHg |
|---|---|
| 1 inH2O | 1.86827 mmHg |
| 5 inH2O | 9.34134 mmHg |
| 10 inH2O | 18.6827 mmHg |
| 15 inH2O | 28.024 mmHg |
| 30 inH2O | 56.0481 mmHg |
| 50 inH2O | 93.4134 mmHg |
About these units
mmHg (millimetres of mercury): Blood pressure and vacuum gauges, using the conventional 13.5951 g/cm³ mercury.
inH2O (inches of water column): Low duct and furnace pressures, at the conventional 4 °C water reference.
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 inH2O to mmHg instead · All pressure and stress conversions