Enter the volume of the water change (L) and the volume of the tank (L) into the Water Change Calculator. The calculator will evaluate the Water Change.

## Water Change Formula

The following two example problems outline the steps and information needed to calculate the Water Change.

WC = WCV / WT * 100

Variables:

- WC is the Water Change (%)
- WCV is the volume of the water change (L)
- WT is the volume of the tank (L)

To calculate the water change percentage, divide the volume of the water change by the volume of the tank, then multiply by 100.

## How to Calculate Water Change?

The following steps outline how to calculate the Water Change.

- First, determine the volume of the water change (L).
- Next, determine the volume of the tank (L).
- Next, gather the formula from above = WC = WCV / WT * 100.
- Finally, calculate the Water Change.
- 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.

volume of the water change (L) = 4

volume of the tank (L) = 10

WC = WCV / WT * 100** **= ?