Enter the total water usage (gallons) and the total water cost ($/gallon) into the Calculator. The calculator will evaluate the Irrigation System Cost. 

Irrigation System Cost Formula



  • ISC is the Irrigation System Cost ($)
  • WU is the total water usage (gallons)
  • WC is the total water cost ($/gallon)

To calculate Irrigation System Cost, multiply the irrigation water usage by the total water cost per gallon.

How to Calculate Irrigation System Cost?

The following steps outline how to calculate the Irrigation System Cost.

  1. First, determine the total water usage (gallons). 
  2. Next, determine the total water cost ($/gallon). 
  3. Next, gather the formula from above = ISC = WU * WC.
  4. Finally, calculate the Irrigation System Cost.
  5. 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.

total water usage (gallons) = 2000

total water cost ($/gallon) = 0.35