Convert millimeter of mercury to foot of water column
1 mmHg = 0.04460334676 ft H₂O
1 mmHg = 0.0446 ft H₂O
1 mmHg in every pressure unit
| pascal | 133 Pa |
| kilopascal | 0.133 kPa |
| megapascal | 0.000133 MPa |
| bar | 0.00133 bar |
| atmosphere | 0.00132 atm |
| millimeter of mercury | 1 mmHg |
| pound per square inch | 0.0193 psi |
| foot of water column | 0.0446 ft H₂O |
| gigapascal | 1.33e-07 GPa |
| kip per square inch | 0.0000193 ksi |
| inch of mercury | 0.0394 inHg |
| inch of water column | 0.535 in w.g. |
How the conversion works
Multiply by 0.04460334676 to go from millimeter of mercury to foot of water column, 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? foot of water column to millimeter of mercury — 1 ft H₂O = 22.41984229 mmHg.
millimeter of mercury to foot of water column — common values
| 1 mmHg | 0.044603347 ft H₂O |
| 2 mmHg | 0.089206694 ft H₂O |
| 3 mmHg | 0.13381004 ft H₂O |
| 5 mmHg | 0.22301673 ft H₂O |
| 10 mmHg | 0.44603347 ft H₂O |
| 15 mmHg | 0.6690502 ft H₂O |
| 20 mmHg | 0.89206694 ft H₂O |
| 25 mmHg | 1.1150837 ft H₂O |
| 50 mmHg | 2.2301673 ft H₂O |
| 75 mmHg | 3.345251 ft H₂O |
| 100 mmHg | 4.4603347 ft H₂O |
| 250 mmHg | 11.150837 ft H₂O |
| 500 mmHg | 22.301673 ft H₂O |
| 1000 mmHg | 44.603347 ft H₂O |
Other pressure conversions
Pa → ft H₂OkPa → ft H₂OMPa → ft H₂Obar → ft H₂Oatm → ft H₂Opsi → ft H₂OmmHg → PammHg → kPa