About Cubic Yard Concrete
Cubic Yard Concrete is a set of free tools for estimating concrete quantities from dimensions you provide. It is built for a quick material check, whether you are measuring one slab or comparing premix bags with a ready-mix quote.
What the tools do
Each calculator converts measurements into cubic feet, cubic yards and cubic meters. An optional waste allowance changes the purchase estimate. Typical premix yields give whole-bag alternatives. Prices are your inputs, not live supplier quotes.
The six tasks cover rectangular slabs, round columns, strip footings, solid steps, walls and bag comparisons. The slab tool also adds multiple sections before rounding.
How the numbers are checked
We use standard geometric volumes: a rectangular prism is length × width × depth; a cylinder is π × radius² × height. Stair volume adds the solid strips beneath each tread plus an optional full-run base. The relevant formula and a worked example appear below every calculator.
One yard is three feet, so one cubic yard is 27 cubic feet. The exact meter conversion is one foot = 0.3048 meters. Typical bag yields are approximate; the product label takes precedence. Arithmetic is checked against independently worked examples in the project tests.
What an estimate leaves out
The calculators cannot inspect your site. They do not design structures, choose a concrete mix, account for all openings, predict soil conditions or confirm building-code compliance. Results are estimates only and must not be used as construction, commercial or tax authority.
Before ordering, verify dimensions, form tolerances, actual mix yield, minimum quantities, delivery charges and rounding increments with your supplier or a qualified professional.
Private by design
Calculations run in your browser. No measurements are sent to a server or stored by the tool. There are no ads, analytics, accounts or payments. Read the privacy notice for the full scope.
Technical reference
For unit definitions, see the NIST Guide to the SI conversion tables. This external reference is for units, not a construction endorsement.