 How to calculate the gallons in a swimming pool
To figure out how many gallons are in a swimming pool, determine the length, width, average
depth and multiplier- Length * Width * Average Depth * Multiplier = Gallons
Determine the Multiplier:
Rectangle, square, or free-form pool: multiplier = 7.5.
Round or Oval pool: multiplier = 5.9
Determine the Average Depth:
To determine the average depth in a pool where the bottom slopes, measure the shallow end, the
deep end depth. Add them together and divide by two (2).
Example: Shallow End = 2'. Deep End = 10'
2' + 10' = 12'; 12'/2 = 6' Average Depth
Below are the total gallons for various pool sizes
Standard Pool Above Ground Pools with a Pool Wall of 48 inches
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
Standard Pool Above Ground Pools with a Pool Wall of 52 inches
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
Once you have determined the
total gallons of your pool, try the
Interactive Calculator at the
bottom of page two of this PDF to
calculate the cost. Standard Pool In-Ground Pool Sizes with Varying Depths
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
0.000
13.389
\$0.00
ENTER GALLONS
HCF
MULTIPLY x
TOTAL COST =
RESET
INTERACTIVE CALCULATOR
*
* Combined cost of Akron water and sewer rates. There is no sewer
discount when you fill a swimming pool.