Cap. Gallons	275	550	1000
Diameter	42"	48"	48"
1	2	3	5
2	5	8	14
3	9	14	26
4	14	22	40
5	20	30	55
6	26	40	72
7	32	50	90
8	39	61	110
9	46	72	130
10	53	84	151
11	60	96	173
12	67	109	196
13	75	122	220
14	82	136	244
15	90	149	269
16	97	163	294
17	105	177	319
18	112	192	345
19	120	209	371
20	127	221	397
21	135	236	424
22	142	250	451
23	150	265	477
24	157	280	504
25	165	295	531
26	172	310	558
27	180	325	584
28	187	339	611
29	195	354	637
30	203	369	663
31	210	383	689
32	217	397	715
33	224	411	740
34	231	424	764
35	238	436	789
36	244	451	812
37	250	464	865
38	256	476	857
39	261	488	879
40	265	500	899
41	268	510	918
42	271	519	935
43		530	954
44		538	969
45		546	983
46		552	994
47		558	1004
48		560	1007

This table applies to tanks made by one particular manufacturer. Will vary
slightly from measurements for tanks made by other manufacturers.