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If your tank is not listed in the table, use the following formula to calculate the tank size (gallons) and then estimate the cubic feet tank capacity at a given pressure from the table above.

Tank Gallons = (Tank Height x (Tank Radius)2) / 73.53

Height and Radius are in inches.

Tank
Size
(inches)
Tank
Size
(gallons)
Gauge Pressure on Tank (PSI)
0 100 150 200
Cubic Feet Tank Capacity
12 x 24 10 1.3 11 15 19
14 x 36 20 2.7 21 30 39
16 x 36 30 4 31 45 59
20 x 48 60 8 62 90 117
20 x 63 80 10.7 83 120 156
24 x 68 120 16 125 180 234
30 x 84 240 32 250 360 467

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