CONSTRUCTION & ARCHITECTURE
Materials & Design
Concrete Volume Calculator
Calculate concrete volume in cubic yards or metres for slabs, footings and piers, including waste allowance, bag counts and ready-mix ordering guidance.
Rebar Weight Calculator
Estimate rebar for a slab grid: number of bars, total length with lap splices, stock bars to buy and weight, for US bar sizes or metric diameters.
Roof Pitch Calculator
Convert roof pitch between x/12, degrees and percent, and find rafter length, ridge height, roof area and roofing squares for a gable roof.