Greenhouse Irrigation System Calculator
Size a drip or overhead irrigation system for greenhouse benches including emitter count, flow rate, and water usage.
Inputs
ft
in
GPH
min
Results
Total Emitters
540
Daily Water Usage
90 gal
Emitters per Bench90
System Flow Rate4.5 GPM
Gallons per Watering45 gal
Monthly Water Usage2,700 gal
Tubing Needed540 ft
How to Use This Calculator
- Enter the number of benches and bench length in feet, then select drip irrigation (for containers) or overhead sprinkler (for flats and plugs).
- Enter emitter spacing in inches and flow rate in GPH per emitter, plus waterings per day and minutes per watering cycle.
- Review Total Emitters, System Flow Rate (GPM), and Gallons per Watering to size your supply line and header pipe.
- Note Daily Water Usage (gal) and Monthly Water Usage (gal) to budget water costs and verify your water supply capacity.
- Use Tubing Needed (ft) to calculate your material order for the main and lateral distribution lines.
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