Cylinder Volume Calculator in Feet
Cylinder volume in feet is calculated using V = pi r squared h. For a tank with radius 3 ft and height 8 ft, multiplying pi times 9 times 8 gives 226.195 cu ft, which holds 1,692.05 US gallons (8.378 cu yd). Enter your structural dimensions in feet below to find cubic feet and gallon capacity.
Calculator
Calculated dimensions update this diagram
Building excavation and foundation sizing
This tool calculates volume from foot dimensions. It sizes tanks, pools, and foundation piers.
Cubic foot formula and storage capacity
With radius and height in feet, volume is V = pi r squared h in cubic feet. One cubic foot holds 7.48 US gallons.
Frequently Asked Questions
How do you calculate cylinder volume in cubic feet?
Multiply Pi by radius squared and height in feet: V = π × r² × h.
How do you convert cubic feet to gallons?
Multiply cubic feet by 7.48052 to find US liquid gallons.
How do you convert cubic feet to cubic yards?
Divide cubic feet by 27. For example, 54 cubic feet equals 2 cubic yards.
Can I enter inches into this calculator?
Divide your inch measurements by 12 to convert them to feet before calculating.
How much does one cubic foot of pure water weigh?
A cubic foot of pure water weighs approximately 62.4 pounds (28.3 kg).