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