How to Calculate Pool Volume in Gallons

Proper water treatment and pool maintenance are dependent on the size of your pool, so it’s important to know the capacity of your pool in terms of gallons. Use the following formulas based on the shape of your pool as a guide to approximate your pool ’s volume. Click here for printable version.

AVERAGE DEPTH
Depth of the Deep End + Depth of the Shallow End Divided by 2.
Example:

RECTANGULAR POOLS
Length x Width x Average Depth x 7.5 = Total Gallons
Example:

CIRCULAR POOLS
Diameter x Diameter x Average Depth x 5.9 = Total Gallons
Example:

OVAL POOL
Long Diameter x Short Diameter x Average Depth x 5.9 = Total Gallons
Example:



IRREGULAR POOLS
Estimate section dimensions equivalent to rectangular, oval or circular pool. Calculate per formulas above.

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