Estimate emitter count, total flow, sequential zones and runtime for identical drip lines serving garden beds.
How this calculator works
Emitters per line = floor(line length ÷ spacing), assuming the first emitter is one spacing from the inlet. Check actual factory emitter count and end offsets. Line flow = emitters × emitter flow. Capacity uses available supply flow minus your reserve; complete identical lines are assigned to successive zones. Runtime = target litres per emitter ÷ emitter litres/hour × 60. The target is chosen by you; there is no weather or crop-demand estimate. Emitters are assumed to perform at the stated working pressure. Pipe diameter, maximum lateral length, friction, elevation, filtration, pressure regulation and manufacturer zone limits must be checked separately. This is a garden-bed flow estimate, not a validated irrigation layout or a recommendation for buried lawn drip.
Units and inputs
Use measured inputs and replace the demonstration values. 1 ft = 0.3048 m; 1 sq ft = 0.09290304 m²; 1 inch = 25.4 mm; 1 US gallon = 3.785411784 litres. All entered prices must use the same currency. Zero prices omit the optional budget.
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