It can be a challenge working out the alchemy required to keep your pool in shape. All those chemicals, each one doing something different and dependent on a hundred different variables can cause our brains to melt. 

One of the most important things to know when adding chemicals to your pool is knowing how much to add.  In this case, we need to know how to calculate the volume of water in our pool. 

If your swimming pool is a rectangle with equal depth throughout then there’s no problem. Chances are, though, it’s not. 

How to Calculate Pool Volume 

Thankfully, once you know how much water your swimming pool holds you are sorted. But let’s not jump the gun. 

There are a few simple formulae that we can apply to get to your golden number, but always remember to measure from the water level to the bottom, and not from the wall level. 

Circular Pools

The formula for calculating the volume of water in a circular pool is as follows:

3.14 x radius squared x average depth x 1000 = Approximate volume in litres

This is a simple one and ideal for above-ground pools.

Square/Rectangular Pools

For pools with an equal depth the formula is:

Length x width x depth x 1000 = Approximate volume in litres

Your pool will most likely have a shallow and a deep end, and if this is a gentle slope then the easiest course of action would be to work on an average depth and use the same formula as above. 

However, if your swimming pool has a sheer drop-off between these two areas then the best way forward would be to split the pool into two separate sections and calculate them individually, using the formula above for each.

Do you have something a little trickier to work with? Don’t stress, contact our friendly team and we’ll be happy to assist you in calculating your pool water volume, and finding the best treatment to keep it clean.