How many gallons of water in a 24 foot pool

Multiplier = 7.5 for Rectangle, Square, or Free-Form poolsMultiplier = 5.9 for ring or Oval pools

Determine the average Depth:

To identify the mean depth in a pool where the bottom slopes, measure the shallow end, the deep end depth. Include them together and divide by 2 (2). 

Example:

Shallow end = 2 ft. Deep finish = 10 ft2 ft + 10 ft = 12 ft; 12/2 = 6 ft typical depth

Standard In-Ground Pool quantities in Gallons through Size

Pool Size (in feet)	3.5 ft Avg Depth	4 ft Avg Depth	4.5 ft Avg Depth	5 ft Avg Depth
12×24	7,600	8,600	9,700	10,800
14×28	10,300	11,800	13,200	14,700
15×30	11,800	13,500	15,200	16,900
16×32	13,400	15,400	17,300	19,200
18×36	17,000	19,400	21,900	24,300
19×38	19,000	21,700	24,400	27,100
20×40	21,000	24,000	27,000	30,000
22×44	25,400	29,000	32,700	36,300
25×45	29,531	33,750	37,968	42,187
25×50	32,800	37,500	42,200	46,900
30×50	39,375	45,000	50,525	56,250

Above floor Swimming pool Water volumes by Size

Size	48 in Wall	52 in Wall
12 ft Round	2,975 gals	3,398 gals
15 ft Round	4,646 gals	5,310 gals
18 ft Round	7,646 gals	8,602 gals
21 ft Round	9,106 gals	10,408 gals
24 ft Round	11,895 gals	13,594 gals
27 ft Round	15,054 gals	17,205 gals
30 ft Round	18,585 gals	21,240 gals
33 ft Round	22,488 gals	25,700 gals
12×24 ft Oval	5,948 gals	6,797 gals
15×30 ft Oval	9,293 gals	10,620 gals
16×32 ft Oval	10,573 gals	12,084 gals
18×33 ft Oval	12,267 gals	14,019 gals