Irrigation in the Pacific Northwest

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.


Learn more about the units used on this page.

Water Flow Rate

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

 

Water Flow Time

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)
40 45 50 60
Size (in) 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,