Drip Irrigation Calculator
Emitter Count & Layout
Calculate emitters needed for your garden
Run Time Calculator
Calculate how long to run your drip system
Formula
Emitters = (Bed Length / Spacing + 1) × Number of Rows | Run Time (min) = (Gallons Needed / Total GPH) × 60
Frequently Asked Questions
How many drip emitters do I need?
Place one emitter per plant for small plants, or space emitters every 12 inches along drip lines for row planting. For trees, use 4-8 emitters per tree arranged in a ring. In sandy soil, use closer spacing (6-12") to ensure even moisture.
How long should I run drip irrigation?
Run times depend on emitter flow rate and water needs. For most vegetable gardens with 1 GPH emitters, run 30-60 minutes 2-3 times per week. Adjust based on soil type: sandy soil needs shorter, more frequent runs; clay needs longer, less frequent runs.
What pressure do I need for drip irrigation?
Drip irrigation operates at 15-30 PSI, much lower than sprinkler systems (40-60 PSI). Always install a pressure regulator to reduce household water pressure (40-80 PSI) to protect drip components. Most drip systems perform best at 25 PSI.
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