Sprinkler Coverage Calculator
Number of sprinkler heads and zone GPM for a yard.
Sprinkler heads needed
25
with head-to-head overlap
Yard area
2,400
sq ft
Total GPM (one zone)
50.0
For 1 in/week
150 min
Head-to-head overlap means each sprinkler reaches its neighbor. The 55 percent factor approximates that overlap need. Most home water meters supply 8 to 12 GPM, so split into zones if total GPM exceeds that.
About
Pick your sprinkler radius and arc pattern (full circle, half, quarter, strip). Enter yard size and per-head flow. Get total head count, GPM per zone, and run time for one inch of water per week.
How to use
- Enter yard dimensions.
- Pick sprinkler radius and pattern.
- Set per-head flow.
FAQ
Why head-to-head spacing?+
Each sprinkler should reach its neighbor. Without that overlap, you get dry stripes between heads where coverage drops off. The 55 percent factor approximates the right spacing.