Do you know how many gallons of water is in your pool.  Below is a chart that can help you identity how much water you may have.

Most in-ground pools have a variable depth. The chart below assumes a depth of 7′ at the deep end and 3′ at the shallow end. In addition, the Oval, Grecian, and Kidney shapes vary so the chart below is an estimate only

 

 

In Ground Pools

 
Pool Size Gallons Litres
12’x24′ Rectangle
16’x32′ Rectangle
16’x36′ Rectangle
18’x36′ Rectangle
20’x40′ Rectangle
10,800
19,200
21,600
24,300
30,000
40,824

72,576

81,648

91,854

113,400

16’x32′ Oval
18’x36′ Oval
20’x40′ Oval
17,200
21,700
26,800
65,016

82,026

101,304

17’x33′ Grecian
17’x37′ Grecian
20’x36′ Grecian
20’x44′ Grecian
19,700
22,200
24,300
30,300
74,466

83,916

91,854

114,535

16’x30′ Kidney
16’x34′ Kidney
20’x38′ Kidney
14,900
16,500
20,200
56,322

62,370

76,356

You can use the following formula for calculating the number of gallons of water you’ll need.

Round pool: Take the Diameter times Diameter, times the average depth, times 5.9. For example, for an 18 ft. pool 4 ft. high you would multiply 18 x 18 = 324. Then 324 x 4 = 1,296. Then 1,296 x 5.9 = 7,646.4 gallons needed.

Oval pool: Take the length times width, times the average depth, times 5.9. For example, for an 11′ x 30′ pool 4 ft. high you would multiply 11 x 30 = 330. Then 330 x 4 = 1,320. Then 1320 x 5.9 = 7,788 gallons needed.

Rectangular pool: Take the length times width, times the average depth, times 7.5. For example, for a 12′ x 24′ pool 4 ft. high you would multiply 12 x 24 = 288. Then 288 x 4 = 1,152. Then 1,152 x 7.5 = 8,646 gallons needed

 

 

Above Ground Pools

48″ Wall Height   52″ Wall Height  
Pool Size Gallons Litres Pool Size Gallons Litres
15′ Round
18′ Round
5,300
7,600
20,034

28,728

15′ Round
18′ Round
5,800
8,300
21,924

31,374

20′ Round
24′ Round
9,400
13,600
35,532

51,408

20′ Round
24′ Round
10,200
15,300
38,556

57,834

27′ Round
28′ Round
17,200
18,500
65,016

69,930

27′ Round
28′ Round
18,600
20,000
70,308

75,600

11’x25′ Oval
11’x30′ Oval
6,500
7.800
24,570

29,484

11’x25′ Oval
11’x30′ Oval
7,000
8,400
26,460

31,752

15’x25′ Oval
15’x30′ Oval
8,900
10,600
33,642

40,068

15’x25′ Oval
15’x30′ Oval
9,600
11,500
36,288

43,470

18’x33′ Oval
18’x38′ Oval
14,000
16,100
52,920

60,858

18’x33′ Oval
18’x38′ Oval
15,200
17,500
57,456

66150

 

How to calculate the Water Volume of a Swimming Pool using Charts or a Calculator

Why do you need to know you Pool’s Water Volume?

In order to figure out proper doses of chemicals for your pool, you need to accurately determine how many gallons of water it holds.  To do that, you need to know four different numbers: the length, width, average depth, and a multiplier for your type of pool.

Here is the formula:

Length x Width x Average Depth x Multiplier = Volume in US 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 = 2ft. Deep End = 10ft
2ft + 10ft = 12ft; 12/2 = 6ft Average Depth

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