Irrigation System Calculator

gallons/min
sprinklers
gallons/min

How to Calculate Irrigation System Requirements

Formula for Sprinklers Required

\text{Sprinklers Required} = \frac{\text{Lawn Area}}{\text{Coverage Area per Sprinkler}}

Formula for Total Water Usage

\text{Water Usage (gallons/min)} = \text{Sprinklers Required} \times \text{Flow Rate per Sprinkler}

Steps to Calculate:

  1. Measure your lawn’s length and width.
  2. Determine the coverage area of each sprinkler.
  3. Input the water flow rate per sprinkler.
  4. Use the calculator to get results instantly.

Example

Let’s calculate for a lawn measuring 50 ft by 30 ft with sprinklers covering 200 sq ft each and a water flow rate of 1.5 gallons/min:

  1. Lawn Area: 50 \, \text{ft} \times 30 \, \text{ft} = 1500 \, \text{sq ft}
  2. Sprinklers Required: \frac{1500 \, \text{sq ft}}{200 \, \text{sq ft/sprinkler}} = 8 \, \text{sprinklers}
  3. Total Water Usage: 8 \, \text{sprinklers} \times 1.5 \, \text{gallons/min} = 12 \, \text{gallons/min}

You need 8 sprinklers, and the system will use 12 gallons of water per minute.