Drip irrigation flow calculator
PROTotal flow and run time for a drip zone.
Inputs
Result
Total zone flow
40 gph
Run time / cycle
60 min
Zone total per cycle
40 gal
The formula
Total GPH = emitters × emitter GPH. Run time = target gal ÷ emitter GPH × 60.
Worked example
40 × 1 gph emitters, 1 gal target = 40 gph and 60 min per cycle.
Frequently asked
›Max emitters on ½" tubing?
About 200 gph total, or ~250 ft of tubing.