Concrete Footing Calculator

Summary

Calculate the volume of concrete needed for circular or rectangular footings in cubic yards, cubic feet, and bags.

How it works

1. Enter the footing shape (circular or rectangular), its dimensions, and depth. The calculator applies the appropriate geometry formula — π × r² × depth for circular footings, or length × width × depth for rectangular ones — then converts the result to cubic yards, cubic feet, and bag counts.

Use cases

• Estimating concrete for deck post footings.
• Calculating material needed for fence post bases.
• Planning concrete pours for structural column footings.
• Budgeting bag quantities before a DIY foundation project.

Frequently Asked Questions