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It is a free concrete calculator for contractors and builders. Calculate cubic yards and bags needed for slabs, footings, columns, post holes and tube forms. Imperial input, works offline, no account required.
Fast concrete estimator for contractors. Slabs, yards, bags & footings.
The fastest concrete calculator built for job sites — not classrooms. ConcreteCalc is a free concrete calculator app for contractors, builders, and DIY homeowners. Calculate cubic yards, cubic feet, and bags of concrete needed for any pour — slabs, footings, columns, post holes, and more. Works completely offline. No account needed. No subscription for core calculations. CONCRETE CALCULATORS INCLUDED (FREE) Rectangular Slab Calculator Calculate concrete volume for driveways, patios, sidewalks, garage floors, and any flat rectangular pour. Enter length, width, and thickness in feet and inches — get cubic yards and bag count instantly. Circular Slab & Column Calculator Concrete volume for round slabs, column bases, and circular pads. Enter diameter and thickness, get your cubic yards. Footing Calculator Foundation footing, wall footing, and strip footing concrete estimates. Perfect for residential and commercial foundation work. Post Hole Calculator Calculate concrete needed for fence posts, deck posts, and sign posts. Enter hole diameter, depth, and post size — get bags needed. Tube Form Calculator Sonotube and concrete tube form estimates. Select tube diameter, enter depth, get your concrete volume. I MPERIAL-FIRST INPUT Enter dimensions in feet and inches — the way contractors actually work. Supports fractions. No decimal conversions needed. Results in cubic yards for ready-mix orders and bags for pre-mix work (toggle 40lb, 60lb, 80lb bag sizes). SCREEN STAYS ON WakeLock keeps your display active while you're measuring and calculating. No more unlocking your phone mid-pour. WORKS COMPLETELY OFFLINE No internet connection required. Use it in basements, rural job sites, and any dead zone. All calculations happen locally on your device. WHO IS CONCRETECALC FOR? - Concrete contractors calculating ready-mix yardage before calling the batch plant - General contractors estimating foundation and footing concrete volumes - Framing contractors setting post holes and tube forms - Homeowners pouring driveways, patios, and walkways - Landscapers building retaining walls, footings, and decorative concrete - Anyone who needs a fast, accurate concrete volume calculator on the job