Lawn Irrigation Time
Turn sprinkler output and weekly depth into run time.
About Lawn Irrigation 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.
Formula
Lawn Irrigation Time
Run time = water depth ÷ sprinkler output (in inches per hr)
- sessions
- How the weekly water is split across watering events
Worked example
With the default values below, Lawn Irrigation Time returns Minutes per Week of 120.0. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Sprinkler outputminimum 0 in/hr
- 0.5 in/hr
- Weekly water depthminimum 0 in
- 1 in
- Sessions per weekminimum 1
- 2
Results
- Minutes per Week
- 120.0 min
- Minutes per Session
- 60.0 min
- Hours per Week
- 2.00 hr
Step by step
- 1Values used
- 2Lawn Irrigation Time
- 3Minutes per Week= 120.0 min
- 4Minutes per Session= 60.0 min
- 5Hours per Week= 2.00 hr
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Lawn Irrigation Time calculated?
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.
Why does Lawn Irrigation Time matter?
Splitting the weekly water into fewer, deeper soakings encourages deep roots and less runoff than frequent shallow bursts.
What values do I need to enter?
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.