Construction & Building Calculators
Plan any building project with our free construction calculators. Whether you are pouring a concrete slab, laying bricks or blocks, sizing rebar, digging foundations or framing a structure, these tools give you accurate material quantities in seconds.
Every calculator supports both metric and imperial units and lets you add a waste allowance so you order the right amount first time. Pick the calculator that matches your task below.
Construction Calculators(15)
Concrete Calculator
Calculate how much concrete you need for slabs, footings, columns and walls in cubic yards or metres.
Cement Calculator
Calculate the number of cement bags, sand and aggregate needed for a concrete or mortar mix by ratio.
Brick Calculator
Calculate the number of bricks and mortar needed for any wall or project.
Mortar Calculator
Estimate mortar volume and cement, lime, sand quantities for bricklaying and blockwork.
Concrete Block / CMU Calculator
Calculate the number of concrete blocks or CMUs needed for a wall plus mortar requirements.
Rebar Calculator
Calculate the number of rebar pieces, total length, and weight for slabs, footings, and walls.
Foundation Calculator
Calculate concrete, rebar, and formwork needed for strip, pad, or raft foundations.
Post Hole Calculator
Calculate concrete and gravel needed for setting fence or deck posts in the ground.
Excavation Calculator
Calculate the volume of soil to excavate and the number of skip loads or truck loads needed.
Lumber / Timber Calculator
Calculate board feet, linear feet, and total lumber or timber needed for framing and woodworking projects.
Beam / Load Calculator
Calculate beam size requirements, maximum span, and load capacity for structural beams.
Joist Calculator
Calculate the number of joists, hangers, and blocking needed for floors and ceilings.
Stud Spacing / Framing Calculator
Calculate the number of studs and framing materials needed for wall construction.
Timber / Lumber Fastener Spacing Calculator
Calculate the number and spacing of nails, screws, or bolts needed for timber and lumber connections.
Staircase / Stair Calculator
Calculate rise, run, number of steps, stringer length, and headroom for any staircase.