Garden Hose Flow Rate Calculator
Measure hose flow with a container and stopwatch, then estimate the time needed to deliver another volume.
Results
Flow rate
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Target fill time
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Use the result as a planning estimate and verify project-specific measurements, product information and site conditions where relevant.
How it works
Flow equals collected volume divided by collection time. Target fill time equals target volume divided by flow.
flow = sample volume ÷ sample timeWorked example
Collecting 5 US gal in 30 seconds is 10 US gpm; 50 gallons would take about 5 minutes at the same flow.
Assumptions
- Flow is assumed steady during the test and target fill period.
Limitations
- Hose flow changes with pressure, hose length, fittings, elevation and nozzle restrictions.