All Construction calculators21 calculators

Materials, area & building math

• Concrete CalculatorCalculate cubic yards of concrete needed for a slab, footing or column, plus bags of 80lb mix and estimated cost.
• Paint CalculatorEstimate gallons of paint needed for your walls, with doors, windows and coats factored in.
• Brick CalculatorEstimate how many bricks you need for a wall, including a waste allowance.
• Asphalt CalculatorEstimate tons of hot-mix asphalt needed for a driveway or parking area.
• AC Tonnage CalculatorSize an air conditioner from your home's area, ceiling height, and climate.
• Lumber CalculatorCount board feet and estimate cost for any lumber project.
• Drywall CalculatorEstimate drywall sheets, screws, and joint compound for a room or wall.
• Stair CalculatorLay out comfortable stairs from total rise to riser height, tread depth, and stringer length.
• Tile CalculatorWork out how many tiles you need for a floor or wall, with waste allowance and boxes.
• Flooring CalculatorEstimate laminate, vinyl, or hardwood planks needed based on room size and waste.
• Decking CalculatorEstimate deck boards, screws, and cost from your deck's dimensions and board size.
• Carpet CalculatorEstimate carpet in square meters or square yards, including waste allowance.
• Mulch CalculatorHow many bags or cubic yards of mulch for your garden bed at any depth.
• Gravel CalculatorEstimate gravel volume, weight in tonnes, and cost for driveways and paths.
• Paint Coverage CalculatorWork out how much paint a room needs from wall dimensions, doors and windows, number of coats, and the coverage printed on your tin.
• Grass Seed CalculatorEstimate how much grass seed your lawn needs for a new lawn or overseeding, from area and seed mix, in kilograms and pounds.
• Laminate Flooring CalculatorEstimate laminate planks, packs, underlay, and cost for a room — including the cutting waste allowance professionals add.
• Fence Cost CalculatorEstimate posts, rails, and pickets or panels for a fence run, with spacing and total material cost.
• Rebar CalculatorEstimate the number of reinforcement bars, total length, and steel weight for a slab or wall grid using bar size and spacing.
• Insulation R-Value CalculatorAdd up the thermal resistance of every layer in a wall or roof assembly and see how much each material contributes to the total R-value.
• Roof Pitch CalculatorConvert between rise/run pitch, angle in degrees, and percentage — and get the rafter length multiplier for your roof.