Enter the total change in well drawdown and the total well drawdown into the Well Efficiency Calculator. The calculator will evaluate the Well Efficiency.

## Well Efficiency Formula

The following two example problems outline the steps and information needed to calculate the Well Efficiency.

**WE = dWD / TWD * 100**

Variables:

- WE is the Well Efficiency (%)
- dWD is the total change in well drawdown
- TWD is the total well drawdown

## How to Calculate Well Efficiency?

The following steps outline how to calculate the Well Efficiency.

- First, determine the total change in well drawdown.
- Next, determine the total well drawdown.
- Next, gather the formula from above = WE = dWD / TWD * 100.
- Finally, calculate the Well Efficiency.
- 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 change in well drawdown = 3

total well drawdown = 10

WE = dWD / TWD * 100** **= ?