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Foundations of Excellence

Free tools

Construction Calculators

42 free construction calculators for materials and costs — concrete, framing, roofing, drywall, paint, tile, landscaping and more. Every tool uses US units by default with a metric option, shows its formula, and explains the math behind your result.

Yellow tape measure extended across a dark wood board

Concrete & Masonry

Concrete CalculatorCubic yards and 40/60/80 lb bags for slabs, footings and columns.Concrete Slab CalculatorSlab volume with optional thickened edges, waste and bag counts.Concrete Yard CalculatorReady-mix order rounded to your supplier's increment, trucks and cost.Concrete Bag CalculatorHow many 40, 60 or 80 lb bags for a known volume or set of dimensions.Rebar CalculatorBars, linear feet, 20 ft sticks and weight for a slab grid.Brick CalculatorBricks and mortar volume for a wall, by brick size and joint width.Concrete Block CalculatorCMU blocks and courses for a wall, with optional mortar bags.

Roofing & Framing

Roof Pitch CalculatorPitch (x/12), angle in degrees, slope % and the rafter multiplier.Roofing Materials CalculatorRoof area, squares, shingle bundles, underlayment and drip edge.Rafter CalculatorCommon rafter length with overhang, cut angles and stock length.Stud CalculatorWall studs at 16 or 24 in on center, plus plates.Board Foot CalculatorBoard feet and cost for lumber by thickness, width and length.Stair CalculatorRisers, riser height, treads, total run and stringer length.Deck CalculatorDeck boards, joists and a cost range for a rectangular deck.

Interior & Finishes

Paint CalculatorGallons of paint for a room's walls (and ceiling), by coats and coverage.Tile CalculatorTiles and boxes for a floor or wall, including grout joints and waste.Grout CalculatorGrout volume and pounds from tile size, joint width and depth.Drywall CalculatorSheets of drywall for a room's walls and ceiling by sheet size.Flooring CalculatorSquare footage with waste and boxes of plank, laminate or hardwood.Insulation CalculatorPackages of batts or bags of blown-in, plus an installed cost range.

Landscape & Aggregates

Gravel CalculatorCubic yards and tons of gravel for driveways, paths and bases.Pea Gravel CalculatorPea gravel for paths, patios and play areas — yards, tons and bags.Stone / Crushed Stone CalculatorCrushed stone and #57 stone in yards and tons for bases and drains.Topsoil / Dirt CalculatorTopsoil, fill dirt and garden soil in yards, tons and bags.Sand CalculatorBedding and fill sand in yards, tons and 50 lb bags.Mulch CalculatorCubic yards or bags of mulch for beds at your chosen depth.Paver CalculatorPavers plus base stone and bedding sand for a patio or walk.Asphalt CalculatorTons of hot-mix asphalt for a driveway or lot, with cost.Retaining Wall CalculatorWall blocks, caps, base gravel and drainage stone for a block wall.

Exterior & Fencing

Siding CalculatorWall and gable area in squares of siding, minus openings.Fence CalculatorPosts, rails, pickets and concrete bags for a wood fence.

Measurement & Conversion

Slope CalculatorGrade %, angle, ratio and drop for drainage, ramps and driveways.Square Footage CalculatorArea of rectangles, L-shapes, triangles, circles and trapezoids.Cubic Yard CalculatorCubic yards, cubic feet and tons for any rectangular volume.

Cost Estimators

Concrete Cost CalculatorMaterial plus labor range for a slab, patio or pad.Roof Replacement Cost CalculatorAsphalt shingle roof cost range from footprint and pitch.Paint Cost CalculatorDIY paint and supplies cost vs. a professional painting range.Drywall Installation Cost CalculatorHang-and-finish cost range for walls and ceilings.Fence Cost CalculatorInstalled fence cost range per linear foot by material.Kitchen Remodel Cost CalculatorNational range adjusted for your area, plus a line-item budget.Bathroom Remodel Cost CalculatorNational range adjusted for your area, plus a line-item budget.Home Addition / Construction Cost CalculatorCost range for an addition or whole-house renovation by square foot.

Calculators estimate quantities and planning costs. They do not size structural members — use your adopted code's span tables or an engineer. Read how we calculate.