Pool Sharks

Calculating the number of gallons of water in your pool.

Water testing and correcting potential problems can’t be accurately done if you don’t know how much water your pool holds. Plus, you can end up spending a lot more in chemical treatments in the long run. Here’s a simple method for measuring the number of gallons in your pool.

First of all, you need to determine your average depth. The simplest method is to tie a string that’s been marked off in feet to a weighted object and measure the deep end, then the shallow end. Add these two numbers together and divide by two to get your average depth. Use your average depth number in the following calculations to determine your pool’s capacity.

For Rectangular Pools:
Length x width x average depth x 7.5 = Total Gallons.
Example: A pool that’s 30 feet in length, 15 feet wide and has an average depth of 6 feet holds 20,250 gallons.

For Circular Pools:
Diameter x diameter x average depth x 5.9 = Total Gallons.
Example: A 18foot round pool with an average depth of 5 feet holds 9,558 gallons.

For Oval Pools:
Long diameter x short diameter x average depth x 5.9 = Total Gallons.
Example: If the long diameter is 30 feet, the short diameter is 15 feet and the average depth is 6 feet, the pool holds 15,930 gallons.

For Irregular-Shaped Pools:
It’s best to consult the pool builder or ask a PoolGear Plus Technical Representative for their assistance.