Convert atmosphere to foot of water column
1 atm = 33.8985387 ft H₂O
1 atm = 33.9 ft H₂O
1 atm in every pressure unit
| pascal | 101,000 Pa |
| kilopascal | 101 kPa |
| megapascal | 0.101 MPa |
| bar | 1.01 bar |
| atmosphere | 1 atm |
| millimeter of mercury | 760 mmHg |
| pound per square inch | 14.7 psi |
| foot of water column | 33.9 ft H₂O |
| gigapascal | 0.000101 GPa |
| kip per square inch | 0.0147 ksi |
| inch of mercury | 29.9 inHg |
| inch of water column | 407 in w.g. |
How the conversion works
Multiply by 33.8985387 to go from atmosphere 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 atmosphere — 1 ft H₂O = 0.02949979669 atm.
atmosphere to foot of water column — common values
| 1 atm | 33.898539 ft H₂O |
| 2 atm | 67.797077 ft H₂O |
| 3 atm | 101.69562 ft H₂O |
| 5 atm | 169.49269 ft H₂O |
| 10 atm | 338.98539 ft H₂O |
| 15 atm | 508.47808 ft H₂O |
| 20 atm | 677.97077 ft H₂O |
| 25 atm | 847.46347 ft H₂O |
| 50 atm | 1,694.9269 ft H₂O |
| 75 atm | 2,542.3904 ft H₂O |
| 100 atm | 3,389.8539 ft H₂O |
| 250 atm | 8,474.6347 ft H₂O |
| 500 atm | 16,949.269 ft H₂O |
| 1000 atm | 33,898.539 ft H₂O |
Other pressure conversions
Pa → ft H₂OkPa → ft H₂OMPa → ft H₂Obar → ft H₂Oatm → Paatm → kPaatm → MPaatm → bar