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

- All Efficiency Calculators
- Feed Efficiency Calculator
- Diffraction Efficiency Calculator
- Gravity Fed Water Pressure Calculator
- RO Efficiency Calculator
- Water Heater Efficiency Calculator

## 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:**

- First, determine the total yield. In this example, the total yield is given as 40.
- Next, determine the global amount of water available. For this problem, the global amount of water available is given as 60.
- 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