# How to Calculate How Many Sprinklers I Need

By Natalie Schwab ; Updated September 21, 2017

Installing your own sprinkler system is cost effective and fairly simple, but you first have to know how many sprinklers you need for your yard. You can waste money and even kill your lawn by installing more sprinklers than you need. Measure your yard and determine how many sprinklers you need to keep your lawn lush and healthy.

Use a measuring tape to measure the outside edges of your yard.

Draw the area of your lawn on a piece of graphing paper.

Use simple conversions, like 1 square equals 1 square foot of yard. If your yard is bigger, you can use 1 square equals 5 or 10 square feet of yard.

## Placement of Sprinklers

Lay them out 15 feet apart, if you are using sprinklers with a 15 foot radius. If you are using a sprinkler with a 12 foot radius, place them 12 feet apart.

Look over the graph of your yard to make sure every area of lawn will be covered by your sprinklers.

Count how many sprinklers you have placed on your graph and purchase that many.

#### Things You Will Need

• Measuring tape
• Graph paper