How Much Water is in Your Pool?

Expert Advice

Water Capacity for Common Pool Sizes

(Total Gallons)*

ABOVE GROUND POOLS

AVERGAGE POOL DEPTHS

3'

3.5'

4'

4.5'

12’ Round

2,500

3,400

15’ Round

4,000

4,600

5,000

5,900

18’ Round

7,600

8,600

20’ Round

9,400

10,600

21’ Round

10,400

11,700

24’ Round

13,600

15,300

28’ Round

18,500

20,800

30’ Round

21,200

23,800

11’ x 18’ Oval

4,760

12’ x 24’ Oval

6,800

7,650

15’ x 25’ Oval

8,850

9,960

15’ x 27’ Oval

9,560

15’ x 30’ Oval

10,600

11,950

16’ x 32’ Oval

12,000

18’ x 33’ Oval

14,000

15,800

21’ x 38’ Oval

18,800

21,200

21’ x 41’ Oval

20,320

22,860

IN-GROUND POOLS

AVERGAGE POOL DEPTHS

5'

6'

7'

8'

10’ x 20’ Rectangle

7,500

9,000

10,500

12,000

12’ x 20’ Rectangle

9,000

10,800

12,600

14,400

12’ x 24’ Rectangle

10,800

12,960

15,120

17,300

14’ x 28’ Rectangle

14,700

17,600

20,500

23,500

15’ x 30’ Rectangle

16,900

20,300

23,600

27,000

16’ x 24’ Rectangle

14,400

17,300

20,100

23,000

16’ x 32’ Rectangle

19,200

23,000

26,800

30,700

16’ x 36’ Rectangle

21,600

25,900

30,200

34,500

18’ x 36’ Rectangle

24,300

29,200

34,000

38,800

18’ x 40’ Rectangle

27,200

32,400

37,800

43,200

20’ x 40’ Rectangle

30,000

36,000

42,000

48,000

25’ x 45’ Rectangle

42,200

59,600

59,000

67,500

Any Other Pool Size

Calculate the gallon capacity of your pool using the following formulas. All measurements should be in feet.

Round or Oval Pools

Square or Rectangle Pools

Average Depth

Length or Diameter

Width or Diameter

5.9

= Gallon Capacity

Average Depth

Length

Width

7.5

= Gallon Capacity