Online Calculators > Construction Calculators > Pool Volume Calculator

Pool Volume Calculator

Pool Volume Calculator is used to calculate how much water is needed for your pool. There are 3 shapes of swimming pool that you can calculate with our swimming pool volume calculator, rectangle (square), triangle and circle.

Swimming Pool Volume Calculator

* required field for each calculator

Rectangle & Square

Width* ft Length* ft
Deep End* ft Shallow End   ft
Pool Volume


Diameter* ft
Deep End* ft Shallow End ft
Pool Volume


Base* ft Height* ft
Deep End* ft Shallow End   ft

Pool Volume

How to calculate pool volume?

Following are the pool volume formulas on how to find the volume of a pool based on its shape.

1. Rectangle Pool Volume = Length * Width * (Deep End + Shallow End)/2 * 7.5,
where 7.5 is the approximate conversion from feet to gallon. We take the average of deep end and shallow end of the pool and multiply by width and length to get the total volume.

2. Circle Pool Volume = 3.14 * radius2 * (Deep End + Shallow End)/2 * 7.5,
where radius is half of the diameter.

3. Triangle Pool Volume = (Base * Height)/2 * (Deep End + Shallow End)/2 * 7.5,
The area of a triangle is base times height and divided by 2. This is half the area of a rectangle.

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