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

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

Garden Hose Flow Rate and Time

Garden Hose Flow Rate Calculator

Water Flow Time Calculator

The Equations

Water Flow Rate

Water Flow Time

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