SlabCalc

SlabCalc is a free, no-signup suite of concrete tools built for contractors, builders, and DIYers. At its core are 34 specialized calculators covering slabs, driveways, patios, footings, foundations, walls, CMU block, columns, curbs, stairs, sonotubes, rebar, gravel, garage and basement floors, and more — each returning volume in cubic yards and cubic meters, pre-mix bag counts (40/50/60/80 lb), total weight, and a cost estimate, with an adjustable waste factor and an imperial/metric toggle. Beyond estimating, SlabCalc adds AI-powered tools: a Concrete Crack Analyzer that diagnoses damage from a photo (failure mode, severity 1–5, DIY-or-engineer advice) and a Quote Analyzer that breaks down a contractor's bid (labor / materials / site prep) and flags red flags. Rounding it out are cost-by-city pricing pages, expert guides, a concrete glossary, a Chrome extension, and embeddable widgets — a one-stop platform for concrete planning.