Drip Irrigation: 20 Emitters at 1 GPH for 60 Minutes

Calculate the total water delivered by 20 drip emitters rated at 1 GPH running for 60 minutes.

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How to use this tool

Enter the number of drip emitters in the irrigation zone.
Enter the emitter flow rate in gallons per hour (from the emitter packaging).
Enter the run time per cycle in minutes.
The calculator returns total gallons and litres delivered per cycle.

20 emitters at 1 GPH for one hour — this calculator shows exactly how many gallons your drip system delivers per run.

Frequently asked questions

How do I calculate drip irrigation water usage?: Multiply number of emitters × emitter flow rate (GPH) × run time in hours. For example, 10 emitters at 1 GPH run for 60 minutes delivers 10 gallons.
What emitter flow rate should I use?: Use 0.5–1 GPH emitters for shrubs and vegetables, 2 GPH for larger shrubs and trees. Low-flow emitters reduce runoff and improve water infiltration.