Why Should You Know Your Pool Water Volume?

Are you any good at sums and calculations? One of the first things you’ll need to do when you buy a pool is to ascertain its volume of water. Yes, it involves mathematics, but you don’t have to be an algebra whizz to work out the calculations! The overall measurement of the pool - the dimensions and the volume will help you with your pool calculations.

Calculating water volume

If you correctly calculate the volume of water in your pool, you can easily work out your pool chemistry requirements, but if you get it wrong, you’ll face problems with water sanitation. Plus, you may damage pool equipment that could be expensive to replace.

You might think you can tell how much water your pool holds by glancing at it, but guesswork isn’t good enough! It needs to be accurate.

How to measure a pool from scratch

If you have no idea about the size of your pool, get out your rod or tape measure, or why not use a laser measuring tool? A laser measure is far more accurate than a tape measure. To work out the size of your pool, place a bucket on one side of the pool, point your laser at it and record your distance.
To measure the depth, get a pool brush, place it in your water and check the depth when you pull it out.

Measure the current water level rather than the wall height. Weather conditions will impact water levels that will rise with heavy rain and fall in the heat due to evaporation. More people splashing around in the pool will equate to a loss of water.

Calculations for square or rectangular pools

Once you have these measurements, it’s time to get the volume. Square or rectangular pools are easy to measure. Most pools have variable depths.

Let’s take the average pool as an example. A regular pool is nine metres in length, with a width of four metres and an average depth of 1.75 metres.
The equation you need is length multiplied by width multiplied by average depth, so the total volume is
9m x 4m x 1.75m = 63m³ 

You then x by 1,000 to convert to litres so the total is 63,000 litres

To work out the average depth, add the depth of the deep end by the depth at the shallow end and divide by two.

For example, if the shallow end is 0.3m and it goes to 3.8 metres with the slope being gradual, then the average depth is 1.75

Go figure!

Now you have your accurate pool volume, remember it. That figure is needed when you add chemicals or buy equipment. You’ll never have to work that calculation out again – unless you decide to change your pool.

Are you measuring up whether you need a pool? Need some guidance and advice? Come and talk to the friendly team at Factory Pools Perth. All our fibreglass swimming pools are affordable, come with a lifetime structural warranty and are made locally, built onsite in our factory at Forrestdale. You can view our range at three display centres in and around Perth, so come and take a look and order yours for summer.