Enter the water usage in gallons and the cost per gallon into the calculator to determine the total cost of water consumed.

Water Cost Formula

The following formula is used to calculate the total cost of water consumed.

TC = WU * CPG

Variables:

  • TC is the total cost of water consumed ($)
  • WU is the water usage (gallons)
  • CPG is the cost per gallon of water ($/gallon)

To calculate the total cost of water consumed, multiply the water usage in gallons by the cost per gallon.

What is Water Cost?

Water cost refers to the total expense incurred for the consumption of water. This cost is typically calculated by multiplying the volume of water used by the price per unit volume. Understanding water cost is essential for budgeting and managing expenses in both residential and commercial settings.

How to Calculate Water Cost?

The following steps outline how to calculate the Water Cost.


  1. First, determine the water usage (WU) in gallons.
  2. Next, determine the cost per gallon of water (CPG) in dollars.
  3. Next, gather the formula from above = TC = WU * CPG.
  4. Finally, calculate the Total Cost (TC) in dollars.
  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.

water usage (WU) = 1500 gallons

cost per gallon of water (CPG) = $0.004