🏗️ Construction calculators

Concrete, bricks, paint, flooring and materials. 20 calculators.

• Board Feet Calculator (Lumber)Calculate board feet of lumber from thickness, width and length — plus total cost.
• Brick CalculatorEstimate the number of bricks for a wall from its size, brick dimensions and mortar joint — with waste.
• Concrete Column & Footing Calculator (Round)Calculate concrete volume for round columns, piers, post holes and sonotubes.
• Concrete Mix Calculator (Cement, Sand, Aggregate)Calculate cement bags, sand and coarse aggregate for nominal concrete mixes like M15, M20 and M25.
• Concrete Slab CalculatorCalculate the concrete volume for a slab, patio or driveway — plus pre-mix bags needed, with a waste allowance.
• Drywall / Plasterboard CalculatorEstimate the number of drywall (plasterboard) sheets for walls and ceilings, with waste.
• Excavation & Dirt CalculatorCalculate excavation volume in m³ and cubic yards, including soil swell, and the number of truckloads needed.
• Fence Calculator (Posts & Panels)Calculate the number of fence posts, panels or rails and the concrete needed for any fence length.
• Flooring Calculator (Laminate & Wood)Calculate how many boxes of laminate, vinyl or wood flooring you need — with waste and total cost.
• Gravel & Aggregate CalculatorCalculate how much gravel, sand or crushed stone you need in m³, tonnes and cubic yards for a given area and depth.
• Mortar Calculator (Cement & Sand)Calculate cement bags and sand needed for a given volume of mortar at any mix ratio, such as 1:4 or 1:6.
• Paint Calculator (Walls & Rooms)Calculate how much paint you need for a room from wall size, doors, windows, number of coats and coverage.
• Rebar Weight CalculatorCalculate the weight of steel reinforcement bars (rebar) from diameter, length and quantity.
• Rectangular Tank Volume CalculatorCalculate the capacity of a rectangular or square water tank, sump or overhead tank in litres, m³ and gallons.
• Roof Pitch CalculatorCalculate roof pitch as an angle, ratio (x:12) and percentage — plus rafter length — from rise and run.
• Square Footage & Cost CalculatorCalculate the area of a room or space in ft² and m² and the total cost at a price per unit area.
• Stair Calculator (Risers & Treads)Calculate the number of steps, riser height, total run and stair angle from the floor-to-floor height.
• Steel Plate Weight CalculatorCalculate the weight of steel, stainless steel or aluminium plates and sheets from their dimensions.
• Tile Calculator (Floor & Wall)Calculate how many tiles you need for a floor or wall from the area and tile size — with grout gap and waste.
• Wallpaper CalculatorEstimate how many rolls of wallpaper you need from room perimeter, wall height and roll size — including pattern repeat waste.