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 output.

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.

Fence calculator: estimate posts, pickets, rails, and concrete bags for any fence. Enter post spacing and picket size for a material count and cost.

Flooring calculator for laminate, hardwood, vinyl, or tile. Enter room size to get box count, waste allowance, and cost estimate. Free and instant.

Landscaping materials calculator: cubic yards of mulch, gravel, topsoil, or sand for any area, plus weight in tonnes and optional cost estimate. Free.

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

Rebar calculator: find how many bars you need plus total length and weight for a concrete slab grid. All ASTM A615 sizes (#3-#8), optional cost. Free.

Calculate roof area, roofing squares and shingle bundles for any 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 savings from a shorter shower or low-flow head. Gallons or litres, multi-currency.

Calculate 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.