Construction & Home

Find the right AC or heating size for any room. Enter floor area, sun exposure, occupants and ceiling height to get BTU, tonnage and heating output instantly.

Calculate how many cubic yards of concrete you need for a slab, footing or column — plus bags of pre-mix and an optional cost estimate. Free and instant.

Calculate exactly how many deck boards, joists, and screws you need for your deck build — with waste factor and cost estimate. Free and instant.

Calculate how many drywall sheets, screws, joint compound and tape you need for any room — with a cost estimate. Free, instant and accurate.

Estimate how many fence posts, pickets, rails and concrete bags you need for any fence length. Enter post spacing and picket size for an instant material count and cost estimate.

Calculate how many boxes of laminate, hardwood or vinyl flooring — or how many tiles — you need for any room, including a waste allowance and cost estimate. Free and instant.

Calculate how many cubic yards of mulch, gravel, topsoil, or sand you need for any area. Includes weight in tonnes and an optional cost estimate. Free and instant.

Work out how many gallons or litres of paint you need for a room, allowing for coats, ceiling, doors and windows — with a cost estimate. Free and instant.

Calculate how many rebar bars you need, their total length and weight for a concrete slab grid. Supports all ASTM A615 sizes (#3–#8) and optional cost estimate. Free and instant.

Calculate roof area, roofing squares and shingle bundles needed for any roof pitch and footprint. Includes waste allowance and cost estimate. Free and instant.

See how much water your showers use and what they cost per year, plus what a shorter shower or low-flow head saves. Gallons or litres, multi-currency, free.

Calculate the number of steps, riser height, total run and stringer length for any staircase. Checks IRC R311.7 code compliance instantly. Free and instant.

Calculate exactly how many wallpaper rolls you need for a room, accounting for pattern repeat waste, openings, and roll size. Free and instant.