Construction calculators
Concrete, paint, tiles, roof pitch and mortar. Volume, bags and waste live on separate pages, with separate formulas.
Concrete and mortar
Amount of cement in mortar calculator
Amount of cement in mortar calculator: mortar volume and kilograms of cement per m³.
Use calculator →Concrete calculator
Concrete calculator: length, width, and thickness in meters.
Use calculator →Mortar bags needed calculator
Mortar bags needed calculator: the volume you need and the bag size.
Use calculator →Mortar requirement calculator
Mortar requirement calculator: area, bed thickness, and density.
Use calculator →Materials and insulation
Gravel requirement calculator
Gravel requirement calculator: length, width, thickness, and density.
Use calculator →Sand requirement calculator
Sand requirement calculator: length, width, and bed thickness.
Use calculator →Topsoil requirement calculator
Topsoil requirement calculator: length, width, and bed depth.
Use calculator →Other
Square Footage Calculator
Square footage: a 12 by 10 ft room is 120 sq ft. 5 by 4 m is 20 m².
Use calculator →3-4-5 ratio calculator
3-4-5 ratio calculator: two legs and the hypotenuse.
Use calculator →Brick calculator
Brick calculator: wall area and the brick face including the joint.
Use calculator →Floor area calculator
Floor area calculator: length and width in the header unit.
Use calculator →Heating calculator
Heating calculator: room volume in m³ and a W/m³ figure.
Use calculator →Insulation requirement calculator
Insulation requirement calculator: the area to insulate and the board size.
Use calculator →Linear meter of boards calculator
Linear meter of boards calculator: the area and the board width in centimeters.
Use calculator →Paint calculator
Paint calculator: the area to paint and coverage from the can in m² per liter.
Use calculator →Slope percent calculator
Slope percent calculator: the height difference and the horizontal distance in the header unit.
Use calculator →Plaster requirement calculator
Plaster requirement calculator: the area and the bag consumption.
Use calculator →Ridge height calculator
Ridge height calculator: building span and roof pitch.
Use calculator →Roof pitch angle calculator
Roof pitch angle calculator: half-span and rise to the ridge in the header unit.
Use calculator →Room perimeter calculator
Room perimeter calculator: length and width.
Use calculator →Room volume calculator
Room volume calculator: length, width, and height.
Use calculator →Stair step height calculator
Stair step height calculator: total height and the number of risers.
Use calculator →Tile adhesive requirement calculator
Tile adhesive requirement calculator: area in m² and coverage from the bag or the trowel notch.
Use calculator →Tile quantity calculator
Tile quantity calculator: the area to tile and one tile in centimeters.
Use calculator →Wall area calculator
Wall area calculator: room length, width, and height.
Use calculator →Articles
Short guides for the formulas in this category. Each article leads to a calculator.