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All Calculators

Every StructMath calculator in one place — grouped by trade. Each one ends in an order-ready material list with cost.

Concrete & Masonry

Calculate concrete for slabs, footings, columns and steps: cubic yards for ready-mix, bag counts for 40–90 lb bags,…

Calculate rebar for a slab: bars each way, total linear feet with lap splices, weight by bar size (#3–#8) and 20-ft…

Calculate how much mulch you need: cubic yards for bulk delivery and bag counts for 1.5, 2 and 3 cu ft bags — for…

Calculate gravel, crushed stone, pea gravel, river rock or sand for driveways, paths and beds: cubic yards, cubic…

Calculate paint for a room or wall: paintable area minus doors and windows, gallons for your coats, coverage by paint…

Calculate stairs from floor-to-floor height: number of risers, exact riser height, treads, total run, stringer length…