All calculators
Pick a tool, type your dimensions, get yards/bags/cost — with a diagram, formula, and citations.
concrete
Concrete 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.
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.
Sonotube Calculator
Calculate concrete for round column forms — cubic yards and bag counts for deck footings, porch posts, and pier foundations.
gravel
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.
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.
Pea Gravel Calculator
Estimate tons, cubic yards, and bags of pea gravel for paths, play areas, patios, and drainage.
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.
landscaping
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.
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.
Topsoil Calculator
Calculate cubic yards, weight, and bag counts of topsoil for lawns, raised beds, and grading — with density adjusted for moisture.
Sod Calculator
Calculate square feet, square yards, slabs, and pallets of sod for a new lawn, with waste for cuts around beds and paths.
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.
Fill Dirt Calculator
Calculate cubic yards of fill dirt for grading, levelling, or backfill — including the shrink allowance loose fill loses when it compacts.
wall
Drywall Calculator
Calculate drywall sheets, screws, joint tape, and joint compound for a room. Subtract windows and doors for accurate totals.
Wallpaper Calculator
Work out how many rolls of wallpaper a room needs, including the extra length a pattern repeat forces on every strip.
Stud Calculator
Count wall studs and plate material for a framed wall, including the extra studs that openings and corners require.
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.
deck
Deck Calculator
Calculate deck boards, joists, and posts for any rectangular deck. Configurable board width, gap, and joist spacing.
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.
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.
lumber
Lumber Calculator
Calculate board feet, linear feet, and cost for any lumber order. Useful for framing, decking, trim, and pricing across suppliers.
Board Foot Calculator
Convert lumber dimensions into board feet — the unit hardwood is actually priced in — for any thickness, width, length, and piece count.
Plywood Calculator
Calculate how many sheets of plywood or OSB an area needs, for subfloor, sheathing, or roof deck, with waste and fastener counts.
roofing
Roofing Calculator
Calculate squares, shingle bundles, and underlayment for pitched roofs. Includes pitch correction for accurate area.
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.
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.
Metal Roofing Calculator
Calculate metal roofing panels for a gable roof — panel count, run length from eave to ridge, ridge cap, and fastener quantities.
measurement
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.
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.
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.
Tank Volume Calculator
Calculate tank capacity in gallons and litres for vertical or horizontal cylinders, rectangular tanks, and spheres — with a partial-fill figure.
driveway
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.
Paver Calculator
Calculate paver counts for a patio, walkway, or driveway, plus the base rock and bedding sand the installation needs underneath.
siding
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.
Siding Calculator
Estimate siding coverage, squares, and linear feet for lap, vinyl, or fibre cement — with openings deducted and exposure-based course counts.
masonry
Concrete Block Calculator
Calculate how many concrete blocks a wall needs, plus the mortar bags and sand to lay them, with openings deducted.
Mortar Calculator
Calculate mortar bags and sand for laying block, brick, or stone, adjusted for the joint thickness you are working to.
Brick Calculator
Calculate brick counts for a wall or veneer by brick size, with mortar bags and openings deducted.
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.