Concrete Calculator

About this calculator

This calculator computes the volume of concrete a project needs by multiplying the length, width, and depth of a slab, footing, or similar pour, then converts that volume into practical purchasing units such as cubic yards, cubic meters, or number of pre-mixed bags. Getting the volume right matters because ordering too little means a delayed second pour and a visible seam, while too much wastes money.

DIY builders use it for small projects like a patio, shed base, or fence post footings, while contractors use the same math on a larger scale when ordering ready-mix concrete for a job. It's typically one of the first calculations done when planning a concrete pour, before materials are ordered.