Concrete Tube Cost Calculator

The cost depends on the tube dimensions. Ready-mix concrete costs about $125 to $165 per cubic yard. A hollow concrete cylinder with 24-inch outer diameter, 18-inch inner diameter, and 4 feet tall uses about 0.11 cubic yards per tube. For small quantities, bagged concrete is more practical.

Concrete tubes (hollow cylinders) are used for manholes, drainage structures, well casings, decorative planters, and utility conduits. They can also serve as precast form structures for columns and piers.

The volume of a tube is the difference between the outer cylinder and the inner cylinder: V = π × (R² - r²) × height, where R is the outer radius and r is the inner radius. Our calculator handles this formula automatically with unit conversions.

Yes, you can cast concrete tubes using two concentric cylindrical forms (one inside the other). Use cardboard tubes, PVC pipe, or metal forms. The inner form should be slightly oiled for easy removal. For structural tubes, add rebar reinforcement between the forms.

Minimum wall thickness depends on the application. For non-structural uses like planters, 2 to 3 inches is adequate. For drainage structures, 3 to 4 inches is common. Structural applications may require 4 to 6 inches or more, with reinforcement per engineering specifications.