Calculate water pressure from water height, depth, or head. This calculator estimates PSI, kPa, bar, pascals, atmospheres, feet of head, meters of head, and water column pressure.
Water height:
Enter the vertical water height, depth, or head. Pressure depends on vertical height, not the total pipe length.
Water type:
Choose fresh water, salt water, or enter a custom density for a more specific estimate.
Pressure result:
The calculator converts the water head into pressure using density, gravity, and height.
A water pressure calculator is useful for water tanks, wells, gravity-fed systems, irrigation, plumbing estimates, pools, ponds, hose systems, storage tanks, and water column pressure examples.
Water pressure from height is often called head pressure or static pressure.
The basic water pressure formula is:
P = ρ × g × h
One foot of fresh water creates about 0.433 PSI of gauge pressure.
Fresh water at 50 feet of head creates about 21.65 PSI.
Static water pressure depends on vertical height. Pipe length matters when water is flowing because friction loss can reduce pressure.
Head is the height of the water column. Pressure is the force created by that water height, often shown in PSI, kPa, or bar.