Concrete Calculators is a free set of estimating tools for homeowners, DIYers and contractors. Pick a shape, enter the dimensions in the units you already use, and get cubic yards, bag counts and a realistic cost range before you call the plant — with every formula sourced.
Calculators Included
- Concrete volume: slabs and pads, footings, columns, tubes, stairs, curbs and gutters, and ramps
- Cost estimators: slab cost, concrete floor cost (polish, stain, topping) and concrete removal cost
- Materials: concrete blocks and mortar, block core fill, rebar grids, fence posts, gravel base and bedding sand, retaining wall blocks
- Coatings: sealer coverage, self-leveling underlayment and epoxy kits
Key Features
- Order-Ready Numbers: Volume plus a waste allowance, rounded up to the quarter yard that ready-mix plants actually sell.
- Any Units: Feet and inches, inches, yards, meters or centimeters — switching converts your numbers instead of reinterpreting them.
- Private by Design: No account, and your measurements stay in your browser.
- Browser Extension: Quick slab, footing and column estimates that work offline, with one click to open the full cost breakdown on the site.
How It Works
- Choose the calculator for your pour or project.
- Enter dimensions in your preferred units.
- Read the amount to order, bag counts and cost range, then adjust for your supplier’s pricing.
Who It’s For
- Homeowners and DIYers planning a patio, shed pad or fence posts
- Contractors who need a fast quantity check on site
- Anyone comparing ready-mix delivery against bagged concrete
Estimates are for planning. Confirm quantities and mix specs with your supplier and local building department before you order.