Pool Gallons

Assuming normal shapes and depths, here’s a chart. Otherwise, take a guess, or ask our water lab technician to re-figure it during your next water test.

Round Metal Pools – Gallons

Size	48″	52″	54″
12′	3,500	3,800	4,000
15′	5,300	5,700	5,900
18′	7,600	8,200	8,500
20′	9,400	10,000	10,400
21′	10,000	11,000	11,500
24′	13,700	14,600	15,000
27′	15,900	16,800	17,400
28′	18,500	20,500	21,500
30′	19,000	21,000	22,000
33′	25,000	27,500	28,500

Round Blow-up Pools – Gallons

Diameter	Height	Gallons
8′	30″	640
10′	30″	1000
12′	30″	1500
12′	36″	1800
15′	36″	2800
15′	42″	3300
15′	48″	3750
18′	42″	4800
18′	48″	5500
18′	52″	6000

Oval Pools – Gallons

Size	48″	52″	54″
11’ x 18½’	6,000	6,600	6,800
11’ x 25’	8,500	9,200	9,500
12’ x 17’	6,000	6,600	6,800
12’ x 24’	8,500	9,500	9,800
15’ x 25’	9,500	10,000	10,600
15’ x 26’	10,200	11,000	11,400
15’ x 30’	13,700	14,800	15,400
18’ x 33’	17,500	18,900	19,600
18’ x 38’	19,500	21,000	22,000
18’ x 40’	20,500	22,000	22,900

Rectangular Inground Pools – Gallons

Size	48″ Shallow to 96″ Deep end
12’ x 24’	10,000
16’ x 32’	20,000
18’ x 36’	25,000
20’ x 40’	30,000
24’ x 44’	45,000
25’ x 50’	50,000

To calculate other sizes and shapes; all measurements are in feet:

Round:	Diameter x diameter x average depth x 5.9
	or
Round:	Radius x radius x average depth x 23.6
Rectangle:	Length x width x average depth x 7.5
Oval:	Length x width x average depth x 6.6
Free Form:	Surface area (square feet) x average depth x 7.5
Blow-up Pools:	Contact the manufacturer since the walls are not vertical and the collars affect depth, there is no formula