You’ll need to find the volume of your pool. Here’s a quick formula you can use:
Length x Width x Average Depth x Multiplier = Volume in Gallons
Note: All measurements should be in feet, including the depth.
- Multiplier for rectangular and square pools is 7.5
- Multiplier for oval pools is 6.7
- Multiplier for round pools is 5.9
For above ground pools, assume that the water depth is 6” less than the wall height, so if your pool is 48”, assume the depth is 3.5’, and for a 52” pool, use 4’.
If math isn’t for you, take a look of the chart below featuring common pool sizes and how many gallons of water each size holds.
For more help with calculating your pool size, visit our blog, How to Calculate the Number of Gallons in Your Pool.