Enter the total yield and the global amount of water available into the calculator to determine the Water Efficiency. 

Water Efficiency Formula

The following formula is used to calculate the Water Efficiency. 

Ew = Y / W

  • Where Ew is the Water Efficiency
  • Y is the total yield 
  • W is the global amount of water available 

How to Calculate Water Efficiency?

The following two example problems outline how to calculate the Water Efficiency.

Example Problem #1:

  1. First, determine the total yield. In this example, the total yield is given as 40.
  2. Next, determine the global amount of water available. For this problem, the global amount of water available is given as 60.
  3. Finally, calculate the Water Efficiency using the equation above: 

Ew = Y / W

Inserting the values from above and solving the equation: 

Ew = 40 /60 = .66


Example Problem #2: 

Using the same process as above, first define the variables required by the formula. In this case, these values are:

total yield = 78

global amount of water available = 239

Entering these values yields:

Ew = 78 / 239 = .326