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

 

Water Flow Time Calculator

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.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

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