Sprinkler Coverage Calculator
Calculate how many sprinklers you need for your lawn.
Select sprinkler type and enter lawn area for spacing and quantity recommendations.
Sprinkler Plan
Sprinkler coverage depends on the sprinkler type and its spray radius.
Coverage Area = π × radius² (for full circle)
Number of Sprinklers = Lawn Area / Effective Coverage per Head
Sprinkler types and coverage:
| Type | Radius | Coverage (full circle) | Best For |
|---|---|---|---|
| Fixed/Stationary | 5–15 ft | 78–707 sq ft | Small areas, garden beds |
| Rotary/Gear-driven | 15–35 ft | 707–3,848 sq ft | Medium lawns |
| Rotor/Impact | 25–50 ft | 1,963–7,854 sq ft | Large lawns |
| Pop-up spray | 8–15 ft | 201–707 sq ft | Residential lawns |
Head-to-head spacing rule:
- Sprinklers should be spaced so each head sprays to the next head (100% overlap)
- This ensures even coverage with no dry spots
- Spacing = sprinkler radius (not diameter)
Water pressure:
- Most residential sprinklers need 30–50 PSI
- Check your water pressure before selecting sprinkler type