Not sure how much air is in your tank at a given pressure?
This chart below should answer your question.
*FOR REFERENCE ONLY
Comparison of various tanks and their capacities
Capacity
30
50
72
87
80
80
100
100
120
120
Rating
3000
3000
2650
2650
3000
3500
3300
3500
2650
3500
PSI / FT**3
100.0
60.0
36.8
30.5
37.5
43.8
33.0
35.0
22.1
29.2
PSI
Cubic feet in tank
100
1
2
3
3
3
2
3
3
5
3
200
2
3
5
7
5
5
6
6
9
7
300
3
5
8
10
8
7
9
9
14
10
400
4
7
11
13
11
9
12
11
18
14
500
5
8
14
16
13
11
15
14
23
17
600
6
10
16
20
16
14
18
17
27
21
700
7
12
19
23
19
16
21
20
32
24
800
8
13
22
26
21
18
24
23
36
27
900
9
15
24
30
24
21
27
26
41
31
1000
10
17
27
33
27
23
30
29
45
34
1100
11
18
30
36
29
25
33
31
50
38
1200
12
20
33
39
32
27
36
34
54
41
1300
13
22
35
43
35
30
39
37
59
45
1400
14
23
38
46
37
32
42
40
63
48
1500
15
25
41
49
40
34
45
43
68
51
1600
16
27
43
53
43
37
48
46
72
55
1700
17
28
46
56
45
39
52
49
77
58
1800
18
30
49
59
48
41
55
51
82
62
1900
19
32
52
62
51
43
58
54
86
65
2000
20
33
54
66
53
46
61
57
91
69
2100
21
35
57
69
56
48
64
60
95
72
2200
22
37
60
72
59
50
67
63
100
75
2300
23
38
62
76
61
53
70
66
104
79
2400
24
40
65
79
64
55
73
69
109
82
2500
25
42
68
82
67
57
76
71
113
86
2600
26
43
71
85
69
59
79
74
118
89
2700
27
45
73
89
72
62
82
77
122
93
2800
28
47
76
92
75
64
85
80
127
96
2900
29
48
79
95
77
66
88
83
131
99
3000
30
50
82
98
80
69
91
86
136
103
3100
31
52
84
102
83
71
94
89
140
106
3200
32
53
87
105
85
73
97
91
145
110
3300
33
55
90
108
88
75
100
94
149
113
3400
34
57
92
112
91
78
103
97
154
117
3500
35
58
95
115
93
80
106
100
158
120
3600
36
60
98
118
96
82
109
103
163
123
3700
37
62
101
121
99
85
112
106
168
127
3800
38
63
103
125
101
87
115
109
172
130
3900
39
65
106
128
104
89
118
111
177
134
4000
40
67
109
131
107
91
121
114
181
137
*The above chart is for reference only. The data is thought to be correct. The South Florida Spearfishing Club holds no claim as to the accuracy of the above chart.
