Concrete Calculator by Atlas

Concrete Calculator by Atlas works out how much concrete a job needs, in seconds, on your phone. EASY TO READ • Length, width and thickness → bags of concrete. Big numbers and a big keypad on one screen; footings, columns, bag size, waste and cost are under More. WHAT IT CALCULATES • Slabs, patios and driveways: length × width × thickness • Footings: length × width × depth • Round columns and post holes: diameter × height, with a quantity • Cubic yards, cubic feet and cubic metres • Number of 80 lb, 60 lb and 40 lb premixed bags, rounded up • Waste allowance: add the percentage you normally order extra • Cost: enter what your supplier charges per yard of ready-mix or per bag HOW IT WORKS The app shows the formula it uses. Bag counts use typical premixed yields (80 lb ≈ 0.60 ft³, 60 lb ≈ 0.45 ft³, 40 lb ≈ 0.30 ft³). Check the yield printed on your brand's bag, and confirm quantities with your supplier before you order. Results are estimates. Free, with no ads and no account needed. After the first load it also works offline. Made by AtlasOperator.ai, a small team building simple, single-purpose tools for the trades. Questions or a feature request? Email [email protected].

First public release.