Calculating Pool Volume

How much water is there is your pool?

Properly sizing your pool is critical in determining a chemical program. This allows you to use the correct amounts of chemicals to keep your water clean,  crystal clear and healthy - without either over-dosing or under-dosing

To calculate the volume of a pool we need two values; the surface area and the average depth, which are then multiplied together to give the volume

Surface area

- is calculated as follows:

              Pool Volume Grapphic

Pool Shape Formulae

Rectangular Pool Surface Area = L x W

Round Pool Surface Area = 3.14 x (D/2) x (D/2)

Kidney Pool Surface Area = 0.45 x (A + B) x L

Average Depth

is calculated by measuring the deepest part of the pool and the shallowest part of the pool. Add the 2 figures together and then divide by 2

Multiply the surface area by the average depth to get the volume

If you are measuring in metres the answer will be in cubic metres (m³)

If you are measuring in feet multiply the answer by 7.5 and the result will be in US Gallons, or multiply by 6.2 and the result will be in Imperial Gallons

Make a note of the volume of your pool in your Pool Logbook

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Ken Walker - MyPoolGuru©