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Construction Calculators

Plan your renovation or build with accurate quantity estimates. Calculate paint coverage for walls, the number of floor tiles, flooring panel packs, square metres of styrofoam insulation, concrete volume, and total renovation costs. Reliable figures help you avoid over-ordering and material shortfalls. Pick a calculator below.

Construction — materials and costs

Every renovation or construction project starts with an accurate material estimate. Paint for walls is usually the first purchase — coverage depends on the substrate absorbency, number of coats, and paint type. A standard emulsion covers 8–12 m² per litre per coat, but freshly plastered or dry-lined walls typically need a primer coat first. Floor tiles must account for a 10% waste allowance for cuts and breakages, rising to 15% for diagonal or complex layouts. The tile calculator converts the room area into an exact piece count, reducing the risk of buying a second batch with a different shade. Flooring panels are sold in packs covering a set number of square metres. The panels calculator converts room area into pack quantities including a cutting margin, factoring in the laying direction and skirting offcuts. Styrofoam insulation is a cornerstone of energy-efficient construction. The thickness of the insulation layer determines the wall U-value and annual heating costs. Under Polish WT 2021 regulations, external walls must achieve U no higher than 0.20 W/(m2·K), which typically requires 15–20 cm of EPS 031 polystyrene. Concrete is used for foundations, floor slabs, and ceilings. Volume is calculated as length × width × thickness, with a 5–10% waste addition. The concrete calculator also estimates aggregate and cement quantities for common mix classes such as C20/25 and C25/30. Renovation costs depend on the scope of work, material quality, and regional labour rates. A full apartment fit-out in Poland typically runs 800–2,000 PLN per m². The renovation cost calculator lets you itemise all trades and materials to arrive at a reliable total budget before work begins.

See also: Salary and payroll calculators · VAT calculators · Loan calculators

Frequently asked questions about construction

How to calculate bricks needed for a wall?

Bricks = (wall area / area of one brick with mortar) × waste factor (approx. 1.05).

How much paint is needed per m²?

Paint coverage is typically 8–12 m²/litre per coat. Multiply by number of coats.

How to calculate building volume?

Volume = floor plan area × floor height. For pitched roofs, use geometric formulas.

Renovation costs approximately 500–1500 PLN/m² depending on standard and scope.

Tiles = (area to tile / area of 1 tile) × 1.10 (10% waste allowance).

Volume = length × width × thickness (in metres). Add 5–10% waste.

Insulation thickness depends on thermal requirements — typically 15–20 cm of mineral wool or polystyrene.

Usable area = sum of rooms measured at 1 m above floor level per PN-ISO 9836 standard.

Developer standard means the apartment has plaster, wiring, plumbing and windows but no flooring or furniture.

Yes — construction materials carry 23% VAT; labour for residential construction is taxed at 8%.