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Swimming Pool Size Chart

Want to know how much water your swimming pool holds? The charts below will tell you!

Of course, the numbers can’t tell you how much water you’ll actually use over the course of a season. That depends on the weather and evaporation, how often you use the pool, and many other factors. These charts just refer to how many gallons it takes to fill an empty pool.

Keep in mind that the average family in the USA uses 300 gallons of water every day. That includes bathing, doing laundry, flushing the toilet, and everything else. So adding even a small pool is like adding more than 11 extra days of water use to the year.

We really like the article we linked to above – it breaks down how we use water. And 12% goes to leaks! Dealing with that is a subject for some other website, but it’s worth looking into. Check out the article and start brainstorming your own ideas for saving water and money!

We’ve included a calculator to figure out about how much it will cost to fill your pool Of course, water rates vary widely. Some areas have different rates for households with pools. So you have to check your water bill to find out your costs. Simply consult our charts to find how many gallons your pool holds. Put that and your water bill rate into the calculator to get a rough idea of “startup” costs to fill the pool

We apologize in advance if we didn’t include your pool size here. There are so many variations that it’s impossible to cover them alll!

Round Pools

Pool Diameter
in feet
Pool Depth (inches)
(average, if sloped)
US Gallons
12 48 3400
12 52 3680
15 48 5310
15 52 5750
15 54 5980
18 48 7650
18 52 8280
18 54 8610
20 54 10,620
21 48 10,410
21 52 11,270
24 48 13,600
24 52 14,720
24 54 15,300
27 48 17,200
27 52 18,630
27 54 19,360
30 52 23,900
30 54 23,900
33 54 29,000

Oval Pools

Length
in feet
Width
in feet
Depth in inches US Gallons
12 24 48 6200
12 24 52 6800
15 30 48 9700
15 30 52 10,600
16 32 48 11,000
16 32 52 12,000
18 33 48 12,800

Rectangular Pools

Length
in feet
Width
in feet
Depth in inches US Gallons
12 24 48 8600
12 24 54 9700
12 24 60 10,800
14 48 48 11,000
14 48 54 13,200
14 48 60 17,700
15 30 48 13,500
15 30 54 15,200
15 30 60 16,900
16 32 48 19,400
16 32 54 21,900
16 32 60 24,300
18 36 48 21,700
18 36 54 24,400
18 36 60 27,100
19 38 48 24,000
19 38 54 27,000
19 38 60 30,000
20 40 48 29,000
20 40 54 32,700
20 40 60 36,300
22 44 48 33,750
22 44 54 37,968
22 44 60 42,200
25 45 48 37,500
25 45 54 42,200
25 45 60 46,900
25 50 48 45,000
25 50 54 50,525
25 50 60 56,250