Pool Size Chart

Gallons for common above-ground and in-ground pools, plus the salt and chlorine each size needs. Click a size for the full breakdown, or use the volume calculator for any other size.

Last updated October 27, 2026 · Checked against published product doses · How we calculate

Above-ground round pools

Pool	Depth	Gallons	Litres	Salt to 3,200 ppm	10% chlorine per +1 ppm
12 ft round pool	4 ft	3,384	12,810	90 lb	4 fl oz
15 ft round pool	4 ft	5,288	20,016	141 lb	7 fl oz
16 ft round pool	4 ft	6,016	22,774	161 lb	8 fl oz
18 ft round pool	4 ft	7,614	28,823	203 lb	10 fl oz
21 ft round pool	4 ft	10,364	39,231	277 lb	13 fl oz
24 ft round pool	4 ft	13,536	51,241	361 lb	17 fl oz
27 ft round pool	4 ft	17,132	64,852	458 lb	22 fl oz
28 ft round pool	4 ft	18,425	69,745	492 lb	24 fl oz
30 ft round pool	4 ft	21,151	80,064	565 lb	27 fl oz
33 ft round pool	4 ft	25,592	96,877	683 lb	33 fl oz
10 ft round pool, 30 in deep	2.5 ft	1,469	5,560	39 lb	2 fl oz
12 ft round pool, 30 in deep	2.5 ft	2,115	8,006	56 lb	3 fl oz
15 ft round pool, 42 in deep	3.5 ft	4,627	17,514	124 lb	6 fl oz
15 ft round pool, 48 in deep	4 ft	5,288	20,016	141 lb	7 fl oz

Above-ground oval pools

Pool	Depth	Gallons	Litres	Salt to 3,200 ppm	10% chlorine per +1 ppm
12 × 24 ft oval pool	4 ft	6,768	25,620	181 lb	9 fl oz
15 × 30 ft oval pool	4 ft	10,575	40,032	282 lb	14 fl oz
16 × 32 ft oval pool	4 ft	12,032	45,548	321 lb	15 fl oz
18 × 33 ft oval pool	4 ft	13,959	52,842	373 lb	18 fl oz
18 × 40 ft oval pool	4 ft	16,921	64,051	452 lb	22 fl oz
18 × 52 ft oval pool	4 ft	21,997	83,267	587 lb	28 fl oz

In-ground rectangle pools

Pool	Depth	Gallons	Litres	Salt to 3,200 ppm	10% chlorine per +1 ppm
10 × 20 ft pool	3.5–6 ft	7,106	26,901	190 lb	9 fl oz
12 × 24 ft pool	3.5–6 ft	10,233	38,737	273 lb	13 fl oz
14 × 28 ft pool	3.5–6 ft	13,929	52,726	372 lb	18 fl oz
15 × 30 ft pool	3.5–6 ft	15,990	60,527	427 lb	20 fl oz
16 × 32 ft pool	3.5–6 ft	18,193	68,867	486 lb	23 fl oz
16 × 36 ft pool	3.5–6 ft	20,467	77,475	547 lb	26 fl oz
18 × 36 ft pool	3.5–6 ft	23,025	87,159	615 lb	29 fl oz
20 × 40 ft pool	3.5–6 ft	28,426	107,604	759 lb	36 fl oz

Depths are water depth: 4 ft for most above-ground pools (a 48- to 54-inch wall), and an average of 3.5 ft to 6 ft for in-ground rectangles. Your pool’s real volume can differ by 10% or more, so measure yours in the volume calculator.

Related