Convert feet of water to psi

Explanation

From this page you can convert feet of water to pounds per square inch (or ftH₂O to psi) simply, by using the application above.

In case you are wondering, to convert from feet of water to pounds per square inch you need to multiply by 0.4335. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 ftH₂O≈0.4335 psi

feet of waterftH₂O

dimension	pressure
symbol	ftH₂O

The conventional foot of water (ftH₂O) is a unit of pressure.

Definition of the foot of water

A foot of water is the pressure exerted by a 1-foot-high column of water.

Value

One foot of water is approximately equal to 2989.067 Pa.

NIST Guide to the SI, Appendix B.9

Equivalences

One foot of water is equivalent to:

Water based pressure units

inch of water	inH₂O	1
foot of water	ftH₂O	12
inch of water at 39.2 °F	-
foot of water at 39.2 °F	-
inch of water at 60 °F	-

pounds per square inchpsi

dimension	pressure
symbol	psi, lbf/in²

The pound per square inch (psi, lbf/in²) or psi is a unit of pressure.

The "pound" in "pound per square inch" is the pound-force, not to be confused with the pound the unit of mass. One pound-force is the force exerted downward by a mass of one avoirdupoids pound on the surface of the Earth.

Definition of the pound per square inch

One psi is equal to the pressure exerted by a force of one pound-force on a surface of one square inch.

Equivalences

One psi is equivalent to:

Other psi units

pound per square inch	psi	1
kilopound per square inch	ksi	1000
megapound per square inch	Mpsi	1 000 000