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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
254
502
751.5
1001
125.87
150.75
175.62
200.5
Pressure (psi)
40455060
Size (in)1/266.577.5
5/8111212.514
3/418192022

Reference: Washington State University