Calculator

Hole Diameter (in)

Hole Depth (in)

Number of Holes

Order This Much

yd³

Exact Total

yd³

Each Hole

yd³

Exact total is π × (diameter ÷ 2)² × depth × hole count, converted to cubic yards. "Order this much" rounds that up to the nearest quarter yard, since ready-mix suppliers typically sell concrete in quarter-yard increments.

Enter a footing hole's diameter, depth, and quantity to calculate the concrete needed in cubic yards.

Round concrete footings and post holes get ordered in cubic yards, not cubic feet, because that's the unit ready-mix trucks are billed in — this calculator is built around that ordering step specifically, rather than being a generic volume tool.

How to Use the Cylinder Cubic Yardage Calculator

Enter one hole's diameter and depth in inches, then how many identical holes need filling; the total scales automatically with the hole count.

volume per hole (yd³) = π × (diameter ÷ 2)² × depth ÷ 27
total = volume per hole × number of holes

The "order this much" figure rounds the exact total up to the nearest quarter yard, since that's the increment most ready-mix suppliers actually sell — quoting a supplier 1.42 cubic yards gets rounded on their end anyway, so this calculator does it up front and shows both numbers side by side. Ready-mix minimums vary by supplier too; a very small order (a couple of footings) is sometimes cheaper or easier hand-mixed in bags than delivered by truck, which is a call this tool leaves to you.