Water Pressure vs. Head

Pressure in pounds per square inch (psi) vs. head in feet of water (ft h2o). Convert between pressure and head measurements using standard conversion factors.

Water Pressure vs. Head Converter

Convert between pressure in pounds per square inch (psi) and head in feet of water (ft H₂O).

Conversion Factors:

  • 1 ft H₂O = 0.4335 psi
  • 1 psi = 2.307 ft H₂O

Select your conversion type below.

Calculator

Inputs

Results

Pressure Result-- psi
Head Result-- ft H₂O

Reference Information

1 ft H₂O = 0.4335 psi = 62.43 lbs/ft²

1 psi (lb/in²) equivalent to:

  • 144 psf (lbf/ft²)
  • 6894.8 Pa (N/m²)
  • 2.307 ft H₂O
  • 27.71 in H₂O at 61°F (16.7°C)
  • 703.1 mm H₂O at 61°F (16.7°C)
  • 0.06895 atm

Example: A head of 64 ft H₂O = 27.7 psi