Formulas and calculators for construction

Find formulas for roof pitch, roof area, measuring and material quantities. See which calculators you can use for your building task, and which measurements you need to have ready.

Roof and measuring

  • Roof

    Find the pitch, angle, sloping length and area of gable and shed roofs.

  • Slope and degrees

    Find the slope of a roof, ramp or sloping surface in percent and degrees.

  • Pythagorean theorem

    Find a side or diagonal in a right triangle for roof surfaces and measuring.

  • Area

    Find the area of floors, walls, roof surfaces and geometric shapes from their dimensions.

  • Perimeter

    Find the length around a surface for baseboards, fences, edges and measuring.

  • Stairs

    Find the rise, tread, run and slope of a straight staircase with a drawing.

Material quantities

  • Concrete

    Calculate m³ of concrete from the length, width and thickness of a rectangular pour.

  • Volume

    Calculate the volume of containers and materials such as concrete, soil, gravel and insulation.

  • Insulation volume

    Find the volume of insulation from the area and thickness, converted to common units.

  • Attic insulation

    Calculate the amount of insulation for the attic from the area and the chosen thickness.

  • Gravel and sand

    Calculate cubic meters and approximate tons for one or more layers of gravel and sand.

  • Bricks

    Calculate bricks per m², number of bricks and mortar for a half-brick wall.

Surfaces and coverings

  • Flooring packs

    Find the number of whole flooring packs from the floor area, waste and coverage per pack.

  • Tiles

    Find the number of whole tile boxes for floors and walls with openings, waste and reserve.

  • Deck

    Find the number of deck boards, cutting and waste from dimensions, board width, gaps and stock lengths.

  • Paint

    Calculate liters of paint from the wall area, openings, number of coats and coverage.

  • Percentage

    Calculate discounts, price increases, material waste and percentage changes.

Quotes and financing

  • Ratio and unit price

    Scale quantities and prices when the ratio between them is fixed.

  • Loan payment

    Calculate a fixed loan payment from the loan amount, periodic interest rate and number of payments.