Estimate garden hose outlet pressure after hose friction, hose length, hose diameter, elevation change, and nozzle loss. Enter starting PSI, flow rate, hose size, and length to calculate pressure loss and remaining outlet pressure.
Starting pressure:
Enter the water pressure at the hose bib, spigot, pump, or supply point.
Hose flow and size:
The calculator estimates friction loss from hose length, inside diameter, flow rate, and hose roughness.
Nozzle and elevation:
It subtracts connector loss, nozzle loss, and elevation rise to estimate remaining outlet pressure.
A garden hose pressure calculator is useful for sprinklers, garden watering, pressure washers, hose reels, long hose runs, drip irrigation, lawn watering, outdoor cleaning, and troubleshooting weak hose flow.
This calculator estimates pressure while water is flowing. Static pressure at the spigot may be higher when the hose is not running.
This calculator estimates hose outlet pressure using:
Outlet Pressure = Starting Pressure - Total Pressure Loss
Yes. A longer garden hose creates more friction loss while water is flowing, which reduces outlet pressure.
Yes. A smaller inside diameter increases water velocity and pressure loss. A 3/4 inch hose usually keeps more pressure than a 1/2 inch hose at the same flow.
Fresh water loses about 0.433 PSI for every foot of elevation rise.
Common causes include a long hose, small hose diameter, clogged nozzle, hose reel restriction, kinked hose, low supply pressure, partially closed spigot, or high water demand from other fixtures.