All calculators

Concrete

• Concrete Slab Calculator Estimate cubic yards, cubic metres and bags of concrete for a slab, patio or pad — with waste factor, the formula and a shopping list.
• Concrete Bag Calculator How many bags of concrete do you need? Compare 40, 60 and 80 lb or 20, 25 and 30 kg bags, total weight and cost — with the math shown.

Paint & Wallpaper

• Paint Calculator Work out gallons or litres of paint for a room, with doors, windows, coats, ceiling and primer — plus the tin sizes to buy.
• Wallpaper Calculator Find how many rolls of wallpaper you need using the drop (strip) method, with pattern repeat and US, UK/EU or wide roll sizes.

Tile

• Tile Calculator Count floor or wall tiles and boxes, with grout joints and extra for straight, offset, diagonal or herringbone layouts.

Flooring

• Flooring Calculator Calculate boxes of laminate, vinyl plank or hardwood flooring for any room, with layout waste, underlay and baseboard length.

Roofing

• Roofing (Shingle) Calculator Turn a house footprint and roof pitch into roof area, roofing squares and shingle bundles, plus starter, ridge cap and underlayment.

Landscaping

• Mulch Calculator How much mulch do you need? Get cubic yards, cubic metres and the number of 2 or 3 cu ft (50/70 L) bags for any bed and depth.
• Gravel Calculator Estimate gravel, crushed stone or pea gravel in cubic yards, cubic metres, short tons and tonnes for paths, driveways and bases.
• Topsoil Calculator Calculate topsoil for lawns, raised beds and garden borders in cubic yards, cubic metres, tonnes and bags — with an allowance for settling.
• Paver Calculator Count patio pavers and estimate sub-base gravel, bedding sand, edging and jointing sand for any patio or path.

Decking

• Deck Board Calculator Work out how many deck boards, joists, screws or hidden clips you need for a deck, using real board widths, gaps and stock lengths.

Fencing

• Fence Calculator Estimate fence posts, rails, pickets or panels and post-hole concrete for any fence length, with gates and real post sizes.

Drywall (Plasterboard)

• Drywall Calculator Count drywall or plasterboard sheets for walls and ceilings, plus joint compound, tape and screws. 4×8, 4×12 and 1200×2400 mm.

Framing & Lumber

• Board Foot Calculator Convert lumber dimensions to board feet and cubic metres, and price hardwood or dimensional lumber by the board foot.
• Stair Calculator Work out the number of steps, riser height, tread depth, total run, stringer length and angle — and check them against common code limits.

Masonry

• Brick Calculator Calculate bricks and mortar for a wall using US modular, UK/EU or Australian brick sizes, single or double skin, with openings and waste.

Conversions

• Square Footage Calculator Find the area of a room or yard in square feet, square metres and square yards — rectangles, triangles, circles and trapezoids.
• Cubic Yard Calculator Convert length, width and depth into cubic yards, cubic feet, cubic metres and litres for soil, mulch, gravel or concrete orders.
• Feet and Inches Calculator Add, subtract, multiply and divide feet-and-inch measurements with fractions to 1/16″, and convert to decimal feet, inches and millimetres.

More categories on the way: Plumbing & Electrical (Lite).