Sprinkler Zone Calculator
Estimate sprinkler head count, maximum heads per zone, zone quantity, design flow, pressure margin and equipment cost.
Default project preview
4 zones
Sprinkler heads
13
Design heads per zone
4
Design zone flow
10 gal/min
Usable source flow
10.8 gal/min
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Heads = round up (area ÷ coverage per head). Maximum heads per zone = usable source flow ÷ flow per head. Zones = round up (heads ÷ maximum heads per zone).
FAQ
Sprinkler Zone Calculator questions
Why reserve some available flow?+
A reserve reduces the chance that small supply changes leave the zone below the required operating flow.
Is square-foot coverage enough to lay out heads?+
No. Proper design uses head-to-head spacing, nozzle patterns, wind exposure and matched precipitation.
What does a negative pressure margin mean?+
The entered source pressure is below the minimum head pressure plus the entered pipe and valve loss allowance.