All Free Construction Calculators
Every calculator on Build Tally in one place — 31 free estimators for concrete, landscaping materials, interior finishes, roofing and framing. All of them run in your browser, in metric or imperial, with a waste allowance built in.
Concrete
Work out exactly how much concrete, block, brick and reinforcement a job needs — in cubic yards, cubic metres or bags. View category
Concrete Calculator
Free concrete calculator: enter your slab dimensions and get cubic yards, cubic metres, bags needed and estimated cost.
Concrete Slab Calculator
Free concrete slab calculator for patios, driveways, garage floors and shed bases.
Brick Calculator
Free brick calculator: work out how many bricks and how much mortar a wall needs.
Concrete Footing Calculator
Free footing calculator: enter footing length, width and depth to get concrete volume in cubic yards, bags needed and cost.
Post Hole Concrete Calculator
Free post hole concrete calculator: work out bags of concrete per post and in total for fence posts, deck posts and mailboxes.
Concrete Block Calculator
Free concrete block calculator: work out how many CMU blocks and how much mortar a wall needs from its length and height.
Rebar Calculator
Free rebar calculator for slabs: work out how many bars, total linear feet and the number of tie intersections from your slab size, spacing and lap length.
Landscaping
Estimate bulk materials for driveways, beds, patios and yards. View category
Gravel Calculator
Free gravel calculator: enter area and depth to get cubic yards, tons and cost for driveways, paths and drainage.
Mulch Calculator
Free mulch calculator: enter bed size and depth to get cubic yards and how many bags of mulch you need.
Fence Calculator
Free fence calculator: work out posts, sections, rails, pickets and concrete from your fence length, post spacing and height.
Topsoil Calculator
Free topsoil calculator: work out how much soil you need for lawns, beds and raised beds in cubic yards, bags and tons.
Sand Calculator
Free sand calculator for paver bases, sandboxes, pool bases and bedding layers.
Asphalt Calculator
Free asphalt calculator: get tons, cubic yards and cost for a driveway or parking area from the dimensions and compacted thickness.
Retaining Wall Calculator
Free retaining wall calculator: work out blocks per course, total blocks, base gravel and drainage stone from your wall length and height.
Paver Calculator
Free paver calculator: how many pavers you need plus base gravel, bedding sand and edge restraint for a patio, walkway or driveway.
Interior
Measure a room once and get everything you need to buy it out: square footage, paint by the gallon or litre, tile and flooring by the box, drywall sheets, insulation rolls and wallpaper rolls — with a cut allowance built in. View category
Square Footage Calculator
Free square footage calculator: add rectangles, circles and triangles to get total area in sq ft, sq m and sq yd.
Paint Calculator
Free paint calculator: enter room size, coats, doors and windows and get gallons or litres needed for walls, ceiling and trim.
Tile Calculator
Free tile calculator: enter the area and tile size to get tiles needed, boxes to buy, grout and adhesive, with a cut allowance.
Flooring Calculator
Free flooring calculator: enter room size and box coverage to get square footage, boxes needed, underlay and cost.
Carpet Calculator
Free carpet calculator: get square feet, square yards and square metres for a room, plus underlay and cost.
Drywall Calculator
Free drywall calculator: get sheets of plasterboard, screws, joint tape and compound from your wall and ceiling dimensions.
Wallpaper Calculator
Free wallpaper calculator: get the number of rolls from room size, roll dimensions and pattern repeat.
Insulation Calculator
Free insulation calculator: get batts, rolls or bags of blown-in insulation for walls, floors and attics from your dimensions, stud spacing and R-value.
Roofing
Turn a building footprint and a roof pitch into real roof area, then into squares, bundles and underlayment. View category
Roof Pitch Calculator
Free roof pitch calculator: convert between rise-over-run, degrees, percentage slope and the slope multiplier used to turn footprint into roof area.
Roofing Calculator
Free roofing calculator: turn building footprint and pitch into true roof area, squares, and material cost.
Shingle Calculator
Free shingle calculator: get bundles, squares, starter strip, ridge cap and nails from your roof area and pitch.
Framing
Work out joists, studs, risers, treads and board feet without the arithmetic. View category
Stair Calculator
Free stair calculator: enter total rise and get equal riser height, tread depth, number of steps, total run and stringer length.
Cubic Yard Calculator
Free cubic yard calculator: convert length, width and depth into cubic yards, cubic feet and cubic metres.
Board Foot Calculator
Free board foot calculator: enter thickness, width, length and quantity to get board feet and cost.
Deck Calculator
Free deck calculator: get decking boards, joists, beams, posts, screws and concrete from your deck dimensions and joist spacing.
Lumber Calculator
Free lumber calculator: get stud counts, top and bottom plates, linear feet and cost for a framed wall from length, height and stud spacing.