Garden Hose Flow Rate and Time

The amount of water flow from a garden hose and minutes to supply that amount of water are determined below, based on the hose size and its supply pressure.

Water Flow Rate

Hose Size:
in
Hose Supply Pressure:
psi
Hose Length:
feet
Water Flow Rate:

Volume:
Time:

The Equations

These calculators use these formulas to determine the water flow rate and time to fill a container with a garden hose.

Water Flow Rate

Where:

= Water flow rate from the end of the hose (gpm)

= An arbitrary number derived from the hose size and supply pressure See Table.

= An arbitrary number to account for hose size See Table.

Water Flow Time

Where:

= Time it will take to fill the specified volume (min)

= Volume needed (gal)

= Flow rate from the garden hose (gpm)

To determine the value for , use this table.

Length (ft) Value
25 4
50 2
75 1.5
100 1
125 .87
150 .75
175 .62
200 .5

To determine the value for , use this table.

 Pressure (psi) Size (in) 40 45 50 60 1/2 6 6.5 7 7.5 5/8 11 12 12.5 14 3/4 18 19 20 22

WSU Prosser - IAREC, 24106 N Bunn Rd, Prosser WA 99350-8694, 509-786-2226,