How Many Gallons Are In My Pool

How many gallons does my pool hold?

Before you can start any kind of chemical treatment of your pool water, you will need to know how many gallons are in your pool. There is a simple way to calculate your pool volume that only requires 4 basic numbers:

  • The length of your pool
  • the width of your pool
  • The average depth
  • the multiplier factor

The formula is LENGTH x WIDTH x AVERAGE DEPTH x MULTIPLIER = The number of gallons in your pool!

length and width are easy measurements that you get with a tape measure. For round pools the “length and width” will be the same and is just calculated as the longest measurement you can get going from one side to the other.

Multiplier is just a factor that depends on the shape of your pool. A rectangle, square or free form pool has a multiplier of 7.5 . A round or oval pool has a multiplier of 5.9

Average depth is just what is says.The average depth of your pool. Take the deepest point plus the shallowest point. Add them together and devide by two. ( For example : shallow end 3′ deepest end 9′ = 12′ feet combined devided by 2 = 6′ average depth ) For above ground pools take 4″ off of the height of the sidewall ( so a 52″ pool has 48″ of water. A 48″ pool has 44″, etc ).

Example: a 10′ x 20′ rectangle pool with an average depth of 6′ would calculate the water volume as follows: 10 x 20 x 6 x 7.5 = 9,000 gallons !

The charts bellow show the water content of standard round and oval above ground pools, as well as some common size in ground pools. Once you have determined your pool volume, Click pool chemicals to see the eFamilyFun solutions for a perfect sparkeling pool!

Above ground pool 48″ wall
12 ft Round  ~2,975 gallons 12′ x 24′ Oval ~ 5,948 gallons
15 ft Round  ~4,646 gallons 15′ x 30′ Oval ~ 9,293 gallons
18 ft Round ~ 7,646 gallons 16′ x 32′ Oval ~ 10,573 gallons
21 ft Round ~ 9,106 gallons 18′ x 33′ Oval ~ 12,267 gallons
24 ft Round ~ 11,895 gallons    
27 ft Round ~ 15,054 gallons    
30 ft Round ~ 18,585 gallons    
33 ft Round ~ 22,488 gallons    

 

Above ground pool 52″ wall
12 ft Round ~ 3,398 gallons 12′ x 24′ Oval ~ 6,797 gallons
15 ft Round ~ 5,310 gallons 15′ x 30′ Oval ~ 10,620 gallons
18 ft Round ~ 8,602 gallons 16′ x 32′ Oval ~ 12,084 gallons
21 ft Round ~ 10,408 gallons 18′ x 33′ Oval ~ 14,019 gallons
24 ft Round ~ 13,594 gallons 18′ x 40′ Oval ~ 19,116 gallons
27 ft Round ~ 17,205 gallons    
30 ft Round ~ 21,240 gallons    
33 ft Round ~ 25,700 gallons  

 

In ground Pools
POOL SIZE GALLON 3.5′ Av. DEPTH GALLON 4′ Av. DEPTH GALLON 4.5′ Av. DEPTH GALLON 5′ Av. DEPTH GALLON 5.5′ Av. DEPTH
12′ x 24′ 7,600 8,600 9,700 10,800 11,900
14′ x 28′ 10,300 11,800 13,200 14,700 16,200
15′ x 30′ 11,800 13,500 15,200 16,900 18,600
16′ x 32′ 13,400 15,400 17,300 19,200 21,100
18′ x 36′ 17,000 19,400 21,900 24,300 26,700
19′ x 38′ 19,000 21,700 24,400 27,100 29,800
20′ x 40′ 21,000 24,000 27,000 30,000 33,000
22′ x 44′ 25,400 29,000 32,700 36,300 39,900
25′ x 45′ 29,531 33,750 37,968 42,187 46,406
25′ x 50′ 32,800 37,500 42,200 46,900 51,600
30′ x 50′ 39,375 45,000 50,525 56,250 61,875

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