Enter the area to be watered, the flow rate of the sprinkler, and the watering time into the calculator to determine the sprinkler output in gallons. This calculator helps in planning irrigation systems and ensuring adequate water coverage for your lawn or garden.

Sprinkler Output Formula

The following formula is used to calculate the sprinkler output.

O = FR * WT

Variables:

  • O is the output of the sprinkler (gallons)
  • FR is the flow rate of the sprinkler (gallons per minute)
  • WT is the watering time (minutes)

To calculate the sprinkler output, multiply the flow rate of the sprinkler by the watering time.

What is Sprinkler Output?

Sprinkler output is the total volume of water distributed by a sprinkler system over a specific area during a given time period. It is an important measure for ensuring that a lawn or garden receives the right amount of water without waste. Proper calculation of sprinkler output helps in efficient water management and maintaining the health of the plants.

How to Calculate Sprinkler Output?

The following steps outline how to calculate the Sprinkler Output.


  1. First, determine the area to be watered (in square feet).
  2. Next, determine the flow rate of the sprinkler (FR) in gallons per minute.
  3. Next, determine the watering time (WT) in minutes.
  4. Next, gather the formula from above = O = FR * WT.
  5. Finally, calculate the Sprinkler Output (O) in gallons.
  6. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Area to be watered = 500 square feet

Flow rate of the sprinkler (FR) = 15 gallons per minute

Watering time (WT) = 30 minutes