Pool Volume Chart

Quick reference showing pool volume in gallons for common pool sizes at various average depths.

Rectangular Pools (Gallons)

Size (L×W ft)	3.5 ft avg	4 ft avg	4.5 ft avg	5 ft avg	5.5 ft avg	6 ft avg
12 × 24	7,540	8,618	9,695	10,772	11,849	12,926
14 × 28	10,263	11,729	13,196	14,662	16,128	17,594
15 × 30	11,782	13,465	15,148	16,831	18,514	20,197
16 × 32	13,405	15,320	17,235	19,150	21,065	22,980
18 × 36	16,966	19,390	21,813	24,237	26,661	29,084
20 × 40	20,945	23,938	26,930	29,922	32,914	35,906
20 × 44	23,040	26,331	29,623	32,914	36,206	39,497
25 × 45	29,455	33,662	37,870	42,078	46,286	50,494
25 × 50	32,727	37,403	42,078	46,753	51,429	56,104

Round Pools (Gallons)

Diameter (ft)	3.5 ft avg	4 ft avg	4.5 ft avg	5 ft avg	5.5 ft avg	6 ft avg
12 ft	2,974	3,398	3,823	4,248	4,673	5,098
15 ft	4,646	5,310	5,974	6,638	7,301	7,965
18 ft	6,691	7,646	8,602	9,558	10,514	11,470
21 ft	9,107	10,408	11,709	13,010	14,310	15,611
24 ft	11,894	13,594	15,293	16,992	18,691	20,390
27 ft	15,054	17,204	19,355	21,506	23,656	25,807
30 ft	18,585	21,240	23,895	26,550	29,205	31,860
33 ft	22,488	25,700	28,913	32,126	35,338	38,551

Oval Pools (Gallons)

Size (W×L ft)	3.5 ft avg	4 ft avg	4.5 ft avg	5 ft avg	5.5 ft avg	6 ft avg
12 × 24	5,947	6,797	7,646	8,496	9,346	10,195
15 × 30	9,293	10,620	11,948	13,275	14,603	15,930
18 × 33	12,266	14,018	15,771	17,523	19,275	21,028
18 × 40	14,868	16,992	19,116	21,240	23,364	25,488
21 × 41	17,780	20,320	22,860	25,400	27,939	30,479