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Al's Water Service, a wise choice for all your water needs

Al's Water Service

2699 Jefferson Avenue
Washington, PA 15301
(724) 222-9059
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Al's Water Service is DEP-certified (PWS ID #5636541) & a registered PA Water Well Driller (LIC.#2493).

Al's Water Service will deliver quality water for your swimming poolPool Gallon Estimator

Not sure how many gallons of water you need to fill your pool? Use the gallon estimator below to approximate the number of gallons you'll need.

If you have any questions, please measure your pool then call us at (724) 222-9059 and we'll calculate the amount for you.

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 may not exactly match your requirements.

All numbers have been rounded to the nearest 100 gallons.

Above Ground Pools In Ground Pools
48" Wall Height 52" Wall Height
Pool Size Gallons Pool Size Gallons
15' Round
18' Round
5,300
7,600
15' Round
18' Round
5,800
8,300
20' Round
24' Round
9,400
13,600
20' Round
24' Round
10,200
15,300
27' Round
28' Round
17,200
18,500
27' Round
28' Round
18,600
20,000
11'x25' Oval
11'x30' Oval
6,500
7.800
11'x25' Oval
11'x30' Oval
7,000
8,400
15'x25' Oval
15'x30' Oval
8,900
10,600
15'x25' Oval
15'x30' Oval
9,600
11,500
18'x33' Oval
18'x38' Oval
14,000
16,100
18'x33' Oval
18'x38' Oval
15,200
17,500
Pool Size Gallons
12'x24' Rect
16'x32' Rect
16'x36' Rect
18'x36' Rect
20'x40' Rect
10,800
19,200
21,600
24,300
30,000
16'x32' Oval
18'x36' Oval
20'x40' Oval
17,200
21,700
26,800
17'x33' Grecian
17'x37' Grecian
20'x36' Grecian
20'x44' Grecian
19,700
22,200
24,300
30,300
16'x30' Kidney
16'x34' Kidney
20'x38' Kidney
14,900
16,500
20,200

If you don't see your size listed, 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.

We get very busy once the weather gets warm, so make sure to call us early.