Construction & DIY Calculators
34 free construction calculators for concrete, paint, flooring, roofing, fencing, lumber, and more. Estimate materials and costs for any project. No signup required.
34 free tools
Concrete Calculator
Calculate cubic yards of concrete for slabs, footings, and columns. See 80lb and 60lb bag counts with waste factor.
Paint Calculator
Room dimensions to gallons of paint needed with coats and coverage rate.
Flooring Calculator
Room dimensions to square footage of flooring with waste factor.
Tile Calculator
Floor or wall area to number of tiles needed with waste factor.
Roofing Calculator
Roof dimensions to squares of shingles and materials needed.
Fencing Calculator
Perimeter length to posts, rails, and boards needed.
Drywall Calculator
Room dimensions to drywall sheets, joint compound, tape, and screws needed.
Gravel & Sand Calculator
Area and depth to tons or cubic yards of gravel, sand, topsoil, or mulch. Optional cost estimate.
Sand Calculator
Calculate tons or cubic yards of sand needed for any area and depth. Includes 50 lb bag count and optional cost estimate.
Deck Calculator
Deck dimensions to boards, joists, posts, footings, and hardware needed.
Lumber Calculator
Board feet calculator and dimensional lumber estimator.
Brick & Block Calculator
Wall area to number of bricks or CMU blocks with mortar and sand estimates.
Staircase Calculator
Total rise to number of steps, riser height, and run depth per code.
Spiral Staircase Calculator
Treads, rotation, tread depth at walk line, helix length, and IBC code compliance for spiral stairs.
Project Cost Estimator
Square footage and project type to rough cost range for construction and remodeling projects.
Insulation Calculator
Wall or attic area to batts or rolls needed by R-value. Select R-13 through R-38.
Wallpaper Calculator
Room dimensions to rolls of wallpaper needed with pattern repeat and opening deductions.
Carpet Calculator
Room dimensions to square yards of carpet needed with waste factor, roll width, seam info, and cost estimate.
Paver Calculator
Calculate number of pavers and base materials (gravel, sand) for patios, walkways, and driveways.
Vinyl Siding Calculator
Calculate vinyl siding squares, panels, and trim needed for your home exterior.
Rebar Calculator
Amount of rebar needed for slabs and footings. Grid spacing, bar count, weight, and tie wire.
Roof Pitch Calculator
Roof pitch from rise and run measurements.
Rafter Length Calculator
Rafter length from pitch and span.
Retaining Wall Calculator
Block and material quantities for retaining walls.
French Drain Calculator
Calculate gravel, perforated pipe, and filter fabric for a french drain trench.
Plywood Calculator
Number of plywood sheets for a given area.
Mortar Calculator
Bags of mortar needed for brick or block work.
Ramp Calculator
Ramp length, slope, and ADA compliance for wheelchair and accessibility ramps.
Miter Angle Calculator
Miter and bevel angles for any corner. Simple miters and compound crown molding cuts.
Epoxy Calculator
Resin and hardener volumes for floors, countertops, and coatings. Supports 1:1 and 2:1 mix ratios.
Shiplap Calculator
Boards needed for shiplap walls with overlap, waste, and trim.
Sealant Calculator
Tubes of caulk or sealant needed for joints.
Wainscoting Calculator
Material for wainscoting from room dimensions.
Concrete Block Fill Calculator
Concrete needed to fill CMU blocks. Full and partial fill options for 6", 8", and 12" block.
About Our Construction Calculators
Every construction calculator on this page is completely free, requires no signup, and runs entirely in your browser. We cover material estimates for concrete, paint, flooring, tile, roofing, fencing, drywall, decking, lumber, gravel, insulation, and dozens more project types.
Whether you are planning a DIY weekend project or estimating materials for a full renovation, these tools give you accurate quantities instantly. All calculations update live as you type, and every tool supports sharing via URL so you can save or send your estimates to a contractor or building supply store.