HOW MANY GALLONS OF WATER DOES MY POOL HOLD ?

In order to figure out proper doses of chemicals for your pool, or plan a re-fill after a Liner Replacement,
you need to determine how many gallons of water it holds.  To do that, you need to know

Four different numbers: the length, width, average depth, and a multiplier that determines gallons.
Round Pools / multiplier = 5.9
Diameter x Diameter x Average Depth of water (Ft.) x 5.9 = Total Gallons (US)

IE: 24' Round Pool / 48" deep side-wall /  42" (3.5 ft.) Water depth
24 x 24 = 576 x 3.5' = 2016 x 5.9 = 11,894 gallons

*Depth of Water in Feet (Ft.) = Subtract side-wall depth by 6"  (See Below ** for pools with shallow & deep ends)
Oval Pools / multiplier = 5.9
Length of pool x Width of pool x Average Depth of water (Ft.) x 5.9 = Total Gallons (US)

IE: 17' x 35' Oval Pool / 54" deep side-wall / 48" (4 ft.) Water depth
17 x 35 = 595 x 4' = 2380 x 5.9 = 14, 042 gallons

*Depth of Water in Feet (Ft.) = Subtract side-wall depth by 6" for  (for one-depth pools & Above Grounds)   Or...
**Determine Average Depth:  Measure the Shallow end and the Deep end depth.   Add them together and divide by 2.
Example:  Shallow end (2') + deep end (6') = 8'    /    8' divided by 2 = Average Depth of 4'
Rectangular Pools / Square or Free Form / multiplier = 7.5
Length of pool x width of pool x Average depth of water* (Ft.) x 7.5 = Total gallons (US)

IE: 16' x 32' Rectangular Pool / 42" deep side-wall / 60" (5 ft.) Average Water depth
16 x 32 = 512 x 5' = 2560 x 7.5 = 19,200 gallons

**Determine Average Depth = Measure the Shallow end and the Deep end depth. Add them together and divide by two (2).
Example:  shallow end (2 1/2') + deep end (7 1/2') = 10'   /   10' divided by 2 = Average Depth of 5'