Why calculate flow rate?

Ensures your system matches water supply without pressure loss or runoff.

Add 10-20% for friction, elevation, and emitter variation.

Irrigation Flow Rate Calculator

Calculate the flow rate of your irrigation system in gallons per minute (GPM) using the simple bucket test method.

Use this calculator to find your system's flow rate by timing how long it takes to fill a container of a known size.

Bucket Size (gallons)

Time to Fill (seconds)

The full supporting guide for this calculator is still being expanded. The tool remains accessible while we improve the educational content.

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