Calculator

Diameter (in)

Height (ft)

Quantity

Total Volume

ft³

Volume Each

ft³

Volume = π × (diameter ÷ 2)² × height, then multiplied by quantity for multiple identical cylinders — a run of fence posts or footing columns, for example.

Enter a cylinder's diameter and height, plus a quantity, to calculate total volume in cubic feet.

How to Use the Cylinder Cubic Footage Calculator

Diameter goes in inches, height in feet — a deliberate unit split, since a cylindrical post or column is almost always specified that way (a "12-inch column," a "4-foot post"). Set a quantity above one to total several identical cylinders at once.

volume (ft³) = π × (diameter ÷ 2)² × height

Columns, posts, drums, and silos are all cylinders for the purpose of this math, whatever they're called on a materials list. Concrete piers, water storage cylinders, and support columns all come up against the same formula, just with different numbers plugged in — this Cylinder Cubic Footage Calculator handles all of them identically.