Construction calculators
Estimate materials before you start a DIY or building project — concrete and blocks, gravel and soil, flooring and drywall, roofing, decks, fences and stairs — with allowances for waste so you buy the right amount the first time. Every calculator works in imperial or metric units.
Carpentry & framing
Board Foot Calculator
Calculate board feet of lumber from thickness, width, length and quantity, with total cost.
Plywood Calculator
Calculate how many sheets of plywood or OSB you need for subfloors, sheathing and roofs.
Wall Framing Calculator
Count the studs and plates needed to frame a wall, including corners and openings.
Concrete & masonry
Brick Calculator
Estimate how many bricks you need for a wall based on brick size, mortar joints and openings.
Concrete Calculator
Work out how much concrete a slab needs in cubic yards, cubic metres and bags.
Post Hole Concrete Calculator
Find how many bags of concrete you need to set fence or deck posts.
Concrete Block Calculator
Count the concrete blocks (CMU) needed for a wall, allowing for openings and waste.
Concrete Column & Sonotube Calculator
Calculate concrete for round columns, piers and Sonotube forms in yards, m³ and bags.
Concrete Stairs Calculator
Estimate the concrete needed for solid poured steps from the number of steps, rise, run and width.
Rebar Calculator
Calculate how many rebar bars, how much length and what weight a slab grid needs.
Decks, fences & stairs
Decking Calculator
Calculate how many deck boards, joists and screws you need for a rectangular deck.
Fence Calculator
Estimate fence posts, rails, pickets and panels for any length of fence.
Stair Calculator
Work out the number of steps, riser height, tread depth, total run and stringer length for stairs.
Ramp Calculator
Find the ramp length, run and angle for a given rise and slope, including ADA wheelchair ramps.
Floors, walls & finishes
Flooring Calculator
Work out how many boxes of laminate, vinyl plank or hardwood flooring to buy, with cost.
Carpet Calculator
Calculate how much carpet you need in square feet, square yards or m², and what it will cost.
Drywall Calculator
Find how many drywall (plasterboard) sheets you need for walls and ceilings, plus screws.
Grout Calculator
Estimate how much tile grout you need from tile size, joint width, joint depth and area.
Paint Calculator
Estimate how much paint you need for a room, allowing for doors, windows and coats.
Tile Calculator
Find how many tiles (and boxes) you need for a floor or wall, including waste.
Wallpaper Calculator
Work out how many rolls of wallpaper you need, allowing for pattern repeat and trimming.
Heating & cooling
Landscaping & driveways
Gravel Calculator
Work out how much gravel you need in cubic yards and tons for a path, patio or driveway.
Mulch Calculator
Work out how many cubic yards or bags of mulch you need to cover your garden beds.
Paver Calculator
Find how many pavers you need for a patio or path, plus the gravel base and bedding sand.
Asphalt Calculator
Estimate how many tons of asphalt (blacktop) you need for a driveway or parking area.
Crushed Stone Calculator
Calculate crushed stone volume and tonnage for driveways, drainage and base layers.
River Rock Calculator
Calculate how much river rock or landscape rock you need in cubic yards and tons.
Road Base Calculator
Estimate road base (crusher run) in tons and cubic yards for driveway and patio sub-bases.
Sand Calculator
Estimate the sand you need in cubic yards, tons and bags for paver bedding, sandboxes and more.
Topsoil Calculator
Find how much topsoil you need for a lawn, garden bed or raised bed, in cubic yards and bags.
Measurements
Cubic Yard Calculator
Convert length, width and depth into cubic yards, cubic feet and cubic metres.
Square Footage Calculator
Calculate the area of rooms and plots in square feet, square yards and square metres.
Metal Weight Calculator
Calculate the weight of steel, aluminium, copper and other metal plates, bars and tubes.
Pools, tanks & pipes
Pool Volume Calculator
Calculate how many gallons or litres of water your rectangular, round or oval pool holds.
Pipe Volume Calculator
Calculate how much water a pipe holds from its inside diameter and length.
Tank Volume Calculator
Find the total and filled volume of vertical, horizontal and rectangular tanks in gallons and litres.
Roofing
Roof Pitch Calculator
Convert roof rise and run into pitch (x/12), angle in degrees and slope percentage.
Roofing Calculator
Estimate roof area, roofing squares and bundles of shingles from the house footprint and pitch.
Rafter Length Calculator
Find common rafter length, roof rise and ridge height from the building span, pitch and overhang.