You have no items in your shopping cart.

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.

Garden Hose Flow Rate Calculator

Hose Size:
Hose Supply Pressure:
Hose Length:
Water Flow Rate:


Water Flow Time Calculator



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


= 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


= 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.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
    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



Reference: Washington State University

Please click here to be redirected to your nearest store and get the best deals!