Professional construction calculators for contractors, builders, architects, and DIY enthusiasts. Calculate materials (concrete, drywall, roofing, gravel), costs, measurements, stairs, and project requirements with contractor-grade accuracy trusted by construction professionals.
From concrete volume to material costs, get accurate estimates for any construction project.
Professional insulation calculator with R-value analysis, multi-layer support, thermal performance metrics, and comprehensive material database for walls, ceilings, and floors.
Professional rebar calculation with 25+ sizes, real-time grid layout, weight analysis, and cost estimation. Calculate reinforcement requirements for slabs, foundations, and construction projects.
Calculate concrete volume and material requirements.
Calculate area in square feet for rooms, floors, and surfaces.
Calculate roofing materials needed for your roof project.
Calculate number of tiles needed for flooring projects.
Calculate stair dimensions including rise, run, and number of steps.
Calculate BTU requirements for heating and cooling systems.
Professional gravel calculator with 9 material types, real-time volume & weight calculations, cost estimation, and compaction analysis. Calculate gravel needed for driveways, pathways, and landscaping projects.
Professional topsoil calculator with real-time volume & weight calculations, multiple area shapes, bag estimator, bulk vs bagged cost comparison, and density options. Calculate topsoil needed for gardens, lawns, and landscaping projects.
Professional plywood calculator with sheet layout optimization, waste analysis, cost estimation, and standard sheet size presets. Calculate plywood sheets needed for floors, walls, roofs, and construction projects.
Professional board foot calculator with three calculation modes, real-time results, weight estimation, and comprehensive cost analysis. Calculate lumber quantities for construction, woodworking, and material ordering with contractor-grade accuracy.
💡 Contractor's Tip: The 10-15% waste factor isn't optional - it accounts for cuts, mistakes, and damaged materials. For complex projects (diagonal tile, intricate cuts), bump it to 20%. Always verify local building codes before starting work - codes vary by jurisdiction. Keep a detailed material list with quantities, costs, and supplier info for insurance and warranty purposes.