Construction Calculators
Enter your measurements to estimate how much concrete, block, drywall, tile, paint, lumber or roofing a job needs. Check local codes and supplier sizes before you order.
Browse calculators
30 toolsAsphalt Calculator
Estimate asphalt weight and material cost from a known area or rectangle, with metric or US-tonne quote choices.
Open calculatorBaluster Spacing Calculator
Plan minimum or chosen baluster counts, equal level-rail gaps and running centers in inches or millimetres.
Open calculatorBoard and Batten Calculator
Plan equal wall battens from a maximum center or clear-gap spacing, or a chosen count, with running marks.
Open calculatorBoard Foot Calculator
Calculate board feet for one board size or a mixed lumber list, with an allowance and volume-based cost.
Open calculatorBrick Calculator
Estimate face bricks from wall dimensions or known net area, actual brick size, joints, layers and waste.
Open calculatorCarpet Calculator
Compare full-width carpet strips in two room directions to estimate roll length, ordered area, seams, and material cost.
Open calculatorConcrete Block Calculator
Estimate whole concrete blocks from wall dimensions or net area, nominal face size and waste, with material cost.
Open calculatorConcrete Calculator
Estimate concrete for rectangular slabs from dimensions or known area, quantity, allowance and product bag yield.
Open calculatorConcrete Weight Calculator
Calculate concrete mass from known volume, area and thickness, or slab dimensions with a supplied density.
Open calculatorDeck Board Calculator
Compare parallel decking directions, stock-board quantities, allowance and material cost.
Open calculatorDrywall Calculator
Estimate drywall sheets and material cost from room dimensions or known net surface area.
Open calculatorFence Material Calculator
Estimate pickets, rails, posts and component cost for a straight run or a list of fence runs.
Open calculatorFrench Drain Calculator
Estimate gravel minus optional pipe displacement and size fabric wraps and rolls for a French drain.
Open calculatorGravel Calculator
Estimate gravel volume, weight and supplier-quoted material cost from an area, rectangle or circle.
Open calculatorGrout Calculator
Estimate grout packages and material cost from tile joints or entered manufacturer package coverage.
Open calculatorInsulation Calculator
Estimate insulation package quantities and nominal material R-value from area, coverage, and thickness.
Open calculatorMortar Calculator
Enter a masonry count or measure a wall, then use your product’s stated units-per-bag yield to estimate whole mortar bags and cost.
Open calculatorPaint Calculator
Estimate paint from a room or known net area, product coverage and coats. Include a ceiling or measured opening deductions, then round to your actual container size.
Open calculatorPaver Calculator
Measure a rectangle or enter a paved area. Estimate whole packs from supplier coverage or individual rectangular pavers, then calculate base, bedding and paving cost.
Open calculatorPlywood Calculator
Estimate sheet purchases for a measured surface using custom panel dimensions and waste.
Open calculatorRafter Length Calculator
Calculate a common rafter’s geometric slope length from horizontal run, overhang, and roof pitch.
Open calculatorRebar Calculator
Estimate a rectangular reinforcement grid, convert measurements, and compare aggregate stock length with a feasible straight-cut plan and material cost.
Open calculatorRoof Area Calculator
Estimate sloped roof area from building dimensions or a known horizontal footprint, convert pitch formats and units, and optionally calculate whole material packages.
Open calculatorRoof Pitch Calculator
Find pitch from rise and run, or use a known pitch to find either measurement. Convert length units and slope formats while retaining the entered geometry.
Open calculatorSquare Footage Calculator
Measure rectangles, circles or triangles, or add different rooms in editable rows. Apply one allowance, convert area units and estimate material cost.
Open calculatorStair Stringer Calculator
Plan equal risers from a finished rise and chosen limit or count. Enter going per tread, or calculate it from a known total floor run, with converted inch/mm measurements.
Open calculatorStud Calculator
Count studs for one wall or several wall rows, reconcile omitted members and framing extras, and apply one final purchase allowance with material cost.
Open calculatorTank Volume Calculator
Enter internal dimensions for a rectangular or flat-ended cylindrical tank. Measure depth or height percentage, or enter a known volume to find its depth.
Open calculatorTile Calculator
Estimate tile boxes from known area, one rectangle or editable surface rows. Convert measurements, apply an allowance and use tile counts or supplier box coverage.
Open calculatorWallpaper Calculator
Count full-height wallpaper drops for one width, a rectangular room or separate wall widths. Include straight-match repeat, trim, roll starting loss and spare rolls.
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