Construction Expert A1 PRO

The ultimate construction calculator trusted by contractors, builders, carpenters, and engineers. Construction Expert A1 Pro replaces your $100+ hardware calculator with a smarter, more powerful app. PROFESSIONAL CALCULATOR - Full feet-inch-fraction math — enter dimensions the way you think - Supports feet, inches, yards, meters, centimeters, millimeters - Fractional entry (1/16 to 1/64 resolution) with auto-simplification - Percentage, square, cube, square root, reciprocal - D:M:S (degrees-minutes-seconds) and trigonometry (sin, cos, tan) - Expression mode with 12 construction formula templates - Running tape with save, share, and print - 3 memory registers + cumulative memory with count/average RIGHT ANGLE & ROOF FRAMING - Pitch, rise, run, diagonal — solve any right triangle instantly - Common rafter length, plumb cut, and level cut angles - Hip/valley rafter with cheek cut angles - Jack rafter lengths with on-center increment - Irregular roof support (dual-pitch hip/valley) - Rake wall stud lengths (ascending or descending) - Roof area, squares, bundles, and 4×8 sheet count - Interactive rafter diagrams STAIR LAYOUT - Total rise to finished risers and treads - Riser adjustment (+/-) for code compliance - Stringer length and inclination angle - Open/closed stringer support - Interactive stair diagram with all dimensions 7 TRADE CALCULATORS - Electrical: Wire sizing (NEC), voltage drop, load calc, conduit fill, box fill, outlet spacing, service sizing - Plumbing: Pipe sizing, DFU, water heater, fitting offsets, drain slope, pressure loss - HVAC: BTU load, duct sizing, CFM, refrigerant charge, filter sizing - Landscaping: Mulch, gravel, sod, irrigation, retaining wall, pavers 57 AREA & VOLUME SHAPES - From simple squares to L-shaped rooms, gable walls, pipe volumes, and toruses - Interactive diagrams with labeled dimensions - Perimeter, surface area, and volume calculations - Construction-specific shapes: concrete steps, retaining walls, trenches 50+ UNIT CONVERTERS - Length, area, volume, weight, temperature, pressure, and more - Construction-specific: concrete bags, rebar, CMU blocks, board feet - Lumber, drywall, roofing, siding, flooring, insulation - Electrical wire gauge, conduit, circuit breakers - Plumbing pipes (PVC, copper, PEX), HVAC tonnage - Aggregates: gravel, sand, topsoil, mulch, fill dirt - Fasteners: nails, screws, bolts, anchors MATERIAL ESTIMATION - Board feet calculator - Stud spacing and count - Concrete volume (slabs, footings, columns) - Roofing (squares, bundles, felt, ridge vent) - Drywall sheets and accessories - Baluster/spindle spacing - Fence materials (posts, rails, pickets) PROJECT MANAGEMENT - Organize calculations by project - Rich text notes with folder organization - Photo attachments for calculations - Star/favorite frequently used calculators - Calculation history with search and filter EXPORT & SHARE - Professional PDF reports with company branding - CSV spreadsheet export - PNG image export - Plain text sharing - 7 specialized PDF generators (rafter, stair, fence, baluster, compound miter, materials, estimate) CUSTOMIZATION - Dark mode / Light mode / System theme - 5 languages: English, Spanish, French, German, Arabic - Fractional resolution (1/2 to 1/64) - Imperial or Metric default units - Home screen widgets - Haptic feedback and sound effects - Company branding for all exports BUILT FOR PROFESSIONALS Whether you're a general contractor estimating a bid, a framer cutting rafters, an electrician sizing wire, or a DIY homeowner planning a deck — Construction Expert A1 Pro has every calculation you need. Download now and see why professionals are switching from their hardware calculators.