Free Tool

Irrigation Calculator

Estimate how many sprinkler heads, zones, and feet of pipe you need, plus total system cost for your lawn.

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$837
estimated DIY materials cost
5 zones
5,000 sq ft coverage
Heads: 26
Pipe: 406 ft
Controller: $75

Don't know your lawn size? Measure it with LotSite for free →

Quick Reference

Sprinkler System Cost by Lawn Size

Estimated DIY material costs for pop-up spray head systems.

1,000 sq ft
Heads
6
Zones
1
Cost
$247
2,000 sq ft
Heads
11
Zones
2
Cost
$395
5,000 sq ft
Heads
26
Zones
5
Cost
$837
8,000 sq ft
Heads
41
Zones
7
Cost
$1,255
10,000 sq ft
Heads
52
Zones
9
Cost
$1,574
15,000 sq ft
Heads
77
Zones
13
Cost
$2,287

Based on pop-up spray heads. Professional installation typically costs 2–3× the materials cost.

Irrigation Guide

Planning Your Sprinkler System

A properly designed irrigation system saves water, saves time, and keeps your lawn consistently green. The key is matching the right sprinkler type to your lawn shape and size, and ensuring every square foot gets uniform coverage.

Start with your lawn measurements. You need to know the total area to irrigate and the shape of each zone. Use LotSite to paint your grass areas on a satellite map and get precise measurements — this is especially helpful for planning zone layouts and head placement.

The most common mistake in DIY irrigation is under-sizing zones. Each zone is limited by your water supply flow rate. If you put too many heads on one zone, pressure drops and coverage suffers. Measure your flow rate at the tap before designing your system.

FAQ

Frequently Asked Questions

Measure your lawn for irrigation

Enter your address to get exact lawn square footage for planning your sprinkler layout.

Also check out our fertilizer calculator and seed calculator