Free construction calculators that actually understand your project.
Estimate concrete, gravel, mulch, drywall, tile, deck, paint, fence, lumber, flooring, and roofing in seconds — with diagrams, weather windows, and shareable links.
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Saved locally on this deviceCalculate cubic yards, cubic meters, and the number of 40, 60, and 80-lb concrete bags for slabs, footings, and columns. Optional price input gives a full project cost.
Calculate cubic yards and tons of gravel for driveways, patios, and drainage. Supports pea, crushed stone, and #57 — each with the correct density.
Calculate squares, shingle bundles, and underlayment for pitched roofs. Includes pitch correction for accurate area.
How an estimate here is put together
Four things every calculator on this site does, and most calculators on the internet don't.
01Measure once, in whatever units you think in
Type feet or metres — the toggle is site-wide and remembered. On a phone with ARCore or ARKit you can tap two points on the floor instead of dragging a tape single-handed.
02See the formula, not just the answer
Every calculator prints the expression it used and cites the standard the constants come from — ACI, AWC, TCNA, NRCA. If a number looks wrong you can check it in one line rather than trusting a black box.
03Waste is added on purpose, and says why
A 10% concrete allowance is not a fudge factor; it is over-excavation and subgrade tolerance. Each calculator names the reason so you can raise it for a complex cut or drop it for a clean pour.
04Order in what the supplier actually sells
Yards and bags. Squares and bundles. Board feet and pieces. The last step of every calculator is the unit on the invoice, because that is the number the yard needs to hear.
All calculators
See allConcrete Calculator
Calculate cubic yards, cubic meters, and the number of 40, 60, and 80-lb concrete bags for slabs, footings, and columns. Optional price input gives a full project cost.
Category: concrete
Gravel Calculator
Calculate cubic yards and tons of gravel for driveways, patios, and drainage. Supports pea, crushed stone, and #57 — each with the correct density.
Category: gravel
Mulch Calculator
Calculate cubic yards and bags of mulch for garden beds. Defaults to 3-inch depth and 2-cubic-foot bags — the most common retail size.
Category: landscaping
Drywall Calculator
Calculate drywall sheets, screws, joint tape, and joint compound for a room. Subtract windows and doors for accurate totals.
Category: wall
Tile Calculator
Calculate tiles, boxes, and cost for floors, walls, backsplashes. Configurable tile size, box quantity, and waste percentage.
Category: tile
Deck Calculator
Calculate deck boards, joists, and posts for any rectangular deck. Configurable board width, gap, and joist spacing.
Category: deck
Paint Calculator
Calculate gallons of paint and primer for any project. Defaults to 350 ft²/gallon coverage and 2 coats — adjust for textured surfaces.
Category: paint
Fence Calculator
Calculate posts, rails, and pickets for any linear fence. Defaults to 8-ft post spacing and a standard 6-ft privacy fence.
Category: fence
Lumber Calculator
Calculate board feet, linear feet, and cost for any lumber order. Useful for framing, decking, trim, and pricing across suppliers.
Category: lumber
Flooring Calculator
Calculate planks, boxes, and cost for laminate, hardwood, or vinyl plank flooring. Configurable plank size and waste percentage.
Category: flooring
Roofing Calculator
Calculate squares, shingle bundles, and underlayment for pitched roofs. Includes pitch correction for accurate area.
Category: roofing
Square Footage Calculator
Work out the square footage of a room, wall, yard, or oddly-shaped area — rectangles, circles, triangles, and borders — then convert to square yards, square metres, or acres.
Category: measurement
Cubic Yard Calculator
Convert length, width, and depth into cubic yards for ordering concrete, gravel, mulch, topsoil, or fill — plus cubic feet, cubic metres, and dump-truck loads.
Category: measurement
Stair Calculator
Lay out a code-compliant staircase: riser count and height, tread depth, total run, stringer length, and angle — with IRC R311.7 limits checked as you type.
Category: deck
Board Foot Calculator
Convert lumber dimensions into board feet — the unit hardwood is actually priced in — for any thickness, width, length, and piece count.
Category: lumber
Roof Pitch Calculator
Convert between roof pitch, angle in degrees, and slope percentage — and get the pitch factor that turns a building footprint into true sloped roof area.
Category: roofing
Asphalt Calculator
Estimate tons of hot-mix asphalt for a driveway, parking pad, or path from length, width, and compacted depth — with volume, weight, and cost.
Category: driveway
Rafter Calculator
Calculate common rafter length from building width and pitch, including overhang along the slope, ridge-board allowance, rafter count, and the stock length to buy.
Category: roofing
Board and Batten Calculator
Work out board and batten counts for a wall — how many wide boards, how many battens, and the linear footage of each — accounting for overlap and openings.
Category: siding
Pool Volume Calculator
Calculate how many gallons a swimming pool holds — rectangular, round, or oval, with sloping or constant depth — for chemical dosing and heater sizing.
Category: measurement
Sand Calculator
Estimate tons, cubic yards, and 50-lb bags of sand for paver bedding, a sandbox, mortar, or fill — with density set by the type of sand you are buying.
Category: gravel
Wallpaper Calculator
Work out how many rolls of wallpaper a room needs, including the extra length a pattern repeat forces on every strip.
Category: wall
Tank Volume Calculator
Calculate tank capacity in gallons and litres for vertical or horizontal cylinders, rectangular tanks, and spheres — with a partial-fill figure.
Category: measurement
Rebar Calculator
Calculate rebar for a slab or footing — bar counts in both directions, total linear feet, weight by bar size, and tie-wire intersections.
Category: concrete
River Rock Calculator
Estimate tons and cubic yards of river rock for beds, dry creek beds, and ground cover, with density adjusted for stone size.
Category: landscaping
Topsoil Calculator
Calculate cubic yards, weight, and bag counts of topsoil for lawns, raised beds, and grading — with density adjusted for moisture.
Category: landscaping
Concrete Block Calculator
Calculate how many concrete blocks a wall needs, plus the mortar bags and sand to lay them, with openings deducted.
Category: masonry
Paver Calculator
Calculate paver counts for a patio, walkway, or driveway, plus the base rock and bedding sand the installation needs underneath.
Category: driveway
Siding Calculator
Estimate siding coverage, squares, and linear feet for lap, vinyl, or fibre cement — with openings deducted and exposure-based course counts.
Category: siding
Stud Calculator
Count wall studs and plate material for a framed wall, including the extra studs that openings and corners require.
Category: wall
Pea Gravel Calculator
Estimate tons, cubic yards, and bags of pea gravel for paths, play areas, patios, and drainage.
Category: gravel
Mortar Calculator
Calculate mortar bags and sand for laying block, brick, or stone, adjusted for the joint thickness you are working to.
Category: masonry
Insulation Calculator
Work out the R-value of a cavity by material and depth, and the whole-wall R-value once thermal bridging through the framing is accounted for.
Category: wall
Sod Calculator
Calculate square feet, square yards, slabs, and pallets of sod for a new lawn, with waste for cuts around beds and paths.
Category: landscaping
Brick Calculator
Calculate brick counts for a wall or veneer by brick size, with mortar bags and openings deducted.
Category: masonry
Retaining Wall Calculator
Calculate block counts, courses, and cap units for a segmental retaining wall, plus the drainage stone and base material behind and beneath it.
Category: masonry
Grass Seed Calculator
Work out how many pounds of grass seed a lawn needs, at the seeding rate for your grass type and whether you are starting fresh or overseeding.
Category: landscaping
Sonotube Calculator
Calculate concrete for round column forms — cubic yards and bag counts for deck footings, porch posts, and pier foundations.
Category: concrete
Baluster Spacing Calculator
Work out how many balusters a railing section needs and the even gap between them, checked against the IRC four-inch sphere rule.
Category: deck
Plywood Calculator
Calculate how many sheets of plywood or OSB an area needs, for subfloor, sheathing, or roof deck, with waste and fastener counts.
Category: lumber
Fill Dirt Calculator
Calculate cubic yards of fill dirt for grading, levelling, or backfill — including the shrink allowance loose fill loses when it compacts.
Category: landscaping
Crushed Stone Calculator
Calculate tons and cubic yards of crushed stone by grade — crusher run, #57, #411 and more — with the density each one actually compacts to.
Category: gravel
Metal Roofing Calculator
Calculate metal roofing panels for a gable roof — panel count, run length from eave to ridge, ridge cap, and fastener quantities.
Category: roofing
🔗 Share a live estimate
Every result encodes into its own link — send it, print it, or embed the calculator on your site.
⛅ Schedule by weather
Concrete, asphalt, paint, and roofing tools surface a 7-day pour window from Open-Meteo.
📡 Works offline
Installable PWA — every calculator works on a roof or basement with no signal.
For property investors: once you have your renovation cost estimate, run the full investment numbers with Astrilio — free calculators for cap rate, cash flow, and mortgage payments.