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, columns, and stairs. 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.
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See allConcrete Calculator
Calculate cubic yards, cubic meters, and the number of 40, 60, and 80-lb concrete bags for slabs, footings, columns, and stairs. 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
📷 Estimate from a photo
Upload a driveway, deck, or wall and our vision AI fills the calculator for you.
⛅ 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.