Turn sprinkler output and weekly depth into run time.
The sprinkler's inches-per-hour output sets how long it must run to deliver the weekly water depth, split into sessions. Splitting the weekly water into fewer, deeper soakings encourages deep roots and less runoff than frequent shallow bursts.
Lawn Irrigation Time
Run time = water depth ÷ sprinkler output (in inches per hr)
Run time = water depth ÷ sprinkler output (in inches per hr) The sprinkler's inches-per-hour output sets how long it must run to deliver the weekly water depth, split into sessions.
Splitting the weekly water into fewer, deeper soakings encourages deep roots and less runoff than frequent shallow bursts.
This calculator takes 3 inputs: Sprinkler output, Weekly water depth, Sessions per week. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.