Board Foot Calculator - Calculate lumber volume in board feet with 25+ wood species, cost estimation, weight calculations, and 3D visualization. Perfect for woodworkers, contractors, and DIY enthusiasts.

Brick and Mortar Calculator - Calculate how many bricks and how much mortar you need for your wall project. Supports doors/windows, multiple brick sizes, bond patterns, and cost estimation.

Carpet Calculator - Calculate carpet square footage, estimate material and installation costs, plan carpet roll layout with seam placement, and account for waste factor. Supports rectangular, L-shaped, and multi-room layouts with padding options and detailed cost breakdowns. New

Concrete Calculator - Calculate concrete volume in cubic yards, meters, and feet for slabs, footings, columns, and stairs. Get pre-mix bag counts, ready-mix estimates, material costs, and professional tips for your project.

Decking Calculator - Calculate all materials needed for your deck project including decking boards, joists, beams, posts, and fasteners. Features interactive SVG diagram, waste allowance, and support for both imperial and metric units.

Drywall Calculator - Calculate the number of drywall sheets needed for walls and ceilings, plus estimates for joint compound, tape, and screws. Supports imperial and metric units with multiple sheet sizes and customizable waste allowance.

Fence Calculator - Calculate fence materials including posts, rails, pickets, panels, concrete, and hardware with visual diagrams. Supports privacy, picket, post & rail, and panel fence styles.

Flooring Calculator - Calculate flooring material needed for any room with our free flooring calculator. Supports hardwood, laminate, vinyl, tile, and carpet. Get box/roll counts, cost estimates, waste allowance, and multi-room totals with visual diagrams.

HVAC Sizing Calculator - Calculate the BTU and tonnage needed to heat or cool any room or building. Factors in room dimensions, insulation quality, climate zone, sun exposure, windows, occupancy, and appliances for accurate HVAC load estimation. New

Insulation Calculator - Calculate recommended R-values, insulation thickness, material quantity, and estimated costs based on your climate zone, building component, and insulation type. New

Lumber Calculator - Calculate board feet from lumber dimensions, estimate the number of boards needed for your project, and get total cost with waste factor. Supports standard and custom lumber sizes, multiple wood species, and project templates for decks, fences, framing, and shelving. New

Miter Angle Calculator - Calculate the precise miter and bevel angles for cutting trim, baseboard, crown molding, and picture frames at any corner angle. Includes interactive angle diagram, step-by-step formulas, saw setup instructions, and common reference angles.

Mulch, Soil & Gravel Calculator - Calculate how much mulch, topsoil, gravel, or sand you need for your landscaping project. Get accurate volume in cubic yards/meters, weight estimates, bag counts, and delivery truck loads with interactive 3D visualization.

Paint Calculator - Calculate exactly how much paint you need for your room with smart coverage estimation. Includes walls, ceiling, and trim calculations with automatic door/window deductions, multiple coat support, texture adjustments, and shopping list with various can sizes.

Paver Calculator - Calculate exactly how many pavers, how much bedding sand, joint sand, and gravel base material you need for your patio, walkway, or driveway. Supports multiple paver sizes and laying patterns with a printable shopping list. New

Rebar Calculator - Calculate the number of rebar bars, total linear footage, weight, and estimated cost for concrete slabs. Supports rebar sizes #3 through #10, application presets for driveways, patios, foundations, and more, with a visual grid layout diagram. New

Retaining Wall Calculator - Calculate the number of blocks, gravel, drainage aggregate, geogrid, and total materials needed for your retaining wall project. Get a detailed material list with cost estimates. New

Roof Pitch Calculator - Calculate roof pitch (slope), angle in degrees, and rafter length from rise and run or span. Interactive visual diagram, multiple calculation modes, and professional results for roofing, carpentry, and construction projects.

Roofing Calculator - Calculate roofing materials for your project including shingles, metal sheets, tiles, or underlayment. Features roof pitch calculator, waste factor adjustment, visual roof diagrams, and material quantity estimation with step-by-step calculations.

Slope and Grade Calculator - Calculate slope as a percentage, ratio, or angle from rise and run, or reverse-calculate missing dimensions from a known slope. Includes ADA compliance checking, steepness gauge, step-by-step solutions, and application-specific recommendations for ramps, drainage, driveways, and roofing. Featured

Square Footage Calculator - Calculate square footage for rectangles, triangles, circles, trapezoids, L-shapes, and custom multi-room layouts. Includes material estimator for paint, flooring, and tile, plus cost calculator and common room size references. New

Squareness Checker (3-4-5 Rule) 📐 - Use the 3-4-5 rule (Pythagorean theorem) to verify if a corner is perfectly square (90 degrees) for foundations, framing, and layout work with instant accuracy feedback and visual diagrams.

Stair Calculator - Calculate stair dimensions including number of steps, rise, run, stringer length, and angle. Verify building code compliance with IRC standards for safe and comfortable staircase design. Supports US Customary and Metric units with automatic optimization or manual step count.

Stud Wall Framing Calculator - Calculate the exact number of studs, plates, and lumber needed for wall framing projects. Features interactive wall diagrams, support for openings (doors/windows), cost estimation, and professional framing tips for 16" or 24" on-center spacing.

Tile Calculator - Calculate exactly how many tiles you need for floors or walls. Get complete material estimates including grout, adhesive, and cost calculations.

Wallpaper Calculator - Calculate how many wallpaper rolls you need for any room. Our calculator considers wall dimensions, pattern repeat, doors and windows, and waste allowance for accurate material estimates that help you save money and avoid running short.