Convert foot of water column to millimeter of mercury
1 ft H₂O = 22.41984229 mmHg
1 ft H₂O = 22.42 mmHg
1 ft H₂O in every pressure unit
| microbar | 29,891 μbar |
| barye | 29,891 Ba |
| millitorr | 22,420 mTorr |
| pascal | 2,989.1 Pa |
| millimeter of water column | 304.8 mmH₂O |
| pound per square foot | 62.428 lb/ft² |
| centimeter of water column | 30.48 cmH₂O |
| hectopascal | 29.891 hPa |
| millibar | 29.891 mbar |
| torr | 22.42 Torr |
| millimeter of mercury | 22.42 mmHg |
| inch of water column | 12 in w.g. |
| kilopascal | 2.9891 kPa |
| foot of water column | 1 ft H₂O |
| inch of mercury | 0.88267 inHg |
| pound per square inch | 0.43353 psi |
| meter of water column | 0.3048 m H₂O |
| decibar | 0.29891 dbar |
| kilogram-force per square centimeter | 0.03048 kgf/cm² |
| bar | 0.029891 bar |
| atmosphere | 0.0295 atm |
| megapascal | 0.0029891 MPa |
| kip per square inch | 0.00043353 ksi |
| gigapascal | 0.0000029891 GPa |
| million pounds per square inch | 4.3353e-07 Mpsi |
How the conversion works
Multiply by 22.41984229 to go from foot 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 foot of water column — 1 mmHg = 0.04460334676 ft H₂O.
foot of water column to millimeter of mercury — common values
| 1 ft H₂O | 22.419842 mmHg |
| 2 ft H₂O | 44.839685 mmHg |
| 3 ft H₂O | 67.259527 mmHg |
| 5 ft H₂O | 112.09921 mmHg |
| 10 ft H₂O | 224.19842 mmHg |
| 15 ft H₂O | 336.29763 mmHg |
| 20 ft H₂O | 448.39685 mmHg |
| 25 ft H₂O | 560.49606 mmHg |
| 50 ft H₂O | 1,120.9921 mmHg |
| 75 ft H₂O | 1,681.4882 mmHg |
| 100 ft H₂O | 2,241.9842 mmHg |
| 250 ft H₂O | 5,604.9606 mmHg |
| 500 ft H₂O | 11,209.921 mmHg |
| 1000 ft H₂O | 22,419.842 mmHg |
Other pressure conversions
Pa → mmHgkPa → mmHgMPa → mmHgbar → mmHgatm → mmHgpsi → mmHginHg → mmHgft H₂O → Pa