Convert inch of water column to millimeter of mercury
1 in w.g. = 1.868320191 mmHg
1 in w.g. = 1.8683 mmHg
1 in w.g. in every pressure unit
| microbar | 2,490.9 μbar |
| barye | 2,490.9 Ba |
| millitorr | 1,868.3 mTorr |
| pascal | 249.09 Pa |
| millimeter of water column | 25.4 mmH₂O |
| pound per square foot | 5.2023 lb/ft² |
| centimeter of water column | 2.54 cmH₂O |
| hectopascal | 2.4909 hPa |
| millibar | 2.4909 mbar |
| torr | 1.8683 Torr |
| millimeter of mercury | 1.8683 mmHg |
| inch of water column | 1 in w.g. |
| kilopascal | 0.24909 kPa |
| foot of water column | 0.083333 ft H₂O |
| inch of mercury | 0.073556 inHg |
| pound per square inch | 0.036127 psi |
| meter of water column | 0.0254 m H₂O |
| decibar | 0.024909 dbar |
| kilogram-force per square centimeter | 0.00254 kgf/cm² |
| bar | 0.0024909 bar |
| atmosphere | 0.0024583 atm |
| megapascal | 0.00024909 MPa |
| kip per square inch | 0.000036127 ksi |
| gigapascal | 2.4909e-07 GPa |
| million pounds per square inch | 3.6127e-08 Mpsi |
How the conversion works
Multiply by 1.868320191 to go from inch of water column to millimeter of mercury, or divide by it to go back. Every conversion on this site routes through the SI value (Pa) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? millimeter of mercury to inch of water column — 1 mmHg = 0.5352401611 in w.g..
inch of water column to millimeter of mercury — common values
| 1 in w.g. | 1.8683202 mmHg |
| 2 in w.g. | 3.7366404 mmHg |
| 3 in w.g. | 5.6049606 mmHg |
| 5 in w.g. | 9.341601 mmHg |
| 10 in w.g. | 18.683202 mmHg |
| 15 in w.g. | 28.024803 mmHg |
| 20 in w.g. | 37.366404 mmHg |
| 25 in w.g. | 46.708005 mmHg |
| 50 in w.g. | 93.41601 mmHg |
| 75 in w.g. | 140.12401 mmHg |
| 100 in w.g. | 186.83202 mmHg |
| 250 in w.g. | 467.08005 mmHg |
| 500 in w.g. | 934.1601 mmHg |
| 1000 in w.g. | 1,868.3202 mmHg |
Other pressure conversions
Pa → mmHgkPa → mmHgMPa → mmHgbar → mmHgatm → mmHgpsi → mmHginHg → mmHgft H₂O → mmHg