Sprinkler Coverage Calculator
Plans the sprinklers for a rectangular lawn.
Sprinklers
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Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
Run time per week — min
Water per week — L
Flow with all running — L/min
The formula
count = (⌈length ÷ radius⌉ + 1) × (⌈width ÷ radius⌉ + 1) litres = area × depth (mm) flow = ⌈length ÷ radius⌉ × ⌈width ÷ radius⌉ × full-circle flow minutes = litres ÷ flow
Head-to-head spacing puts a sprinkler everywhere another one reaches, which is what gives even cover.
What to watch out for
Check the total flow against what your supply delivers, and split it into zones if it is too high.
Frequently Asked Questions
How much water does a lawn need?
About 25 mm a week is a common guide. On 150 m² that is 3,750 litres.