Convert foot of water column to millimeter of mercury
1 ft H₂O = 22.41984229 mmHg
1 ft H₂O = 22.4 mmHg
1 ft H₂O in every pressure unit
| pascal | 2,990 Pa |
| kilopascal | 2.99 kPa |
| megapascal | 0.00299 MPa |
| bar | 0.0299 bar |
| atmosphere | 0.0295 atm |
| millimeter of mercury | 22.4 mmHg |
| pound per square inch | 0.434 psi |
| foot of water column | 1 ft H₂O |
| gigapascal | 0.00000299 GPa |
| kip per square inch | 0.000434 ksi |
| inch of mercury | 0.883 inHg |
| inch of water column | 12 in w.g. |
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