Calcrete

Building material calculators

Work out concrete, screed, brick, insulation, roofing, tile, grout, laminate, drywall, paint and wallpaper. Everything recalculates live as you type.

Structural work

foundationConcrete CalculatorVolume of concrete plus the cement, sand and gravel to mix it.Open →floorFloor Screed CalculatorHow many bags of mix a floor of this area and thickness takes.Open →masonryBrick CalculatorBricks per square metre, total count and the mortar to lay them.Open →thermalInsulation CalculatorSlabs, batts and rolls from area, layers and product size.Open →roofRoofing CalculatorRoof area, panels or packs, underlayment, ridge, edge and cost.Open →floorSelf-Levelling Compound CalculatorBags of floor compound from area, average depth and product rate.Open →

Finishing

tileTile CalculatorRows, columns, orientation, cutting allowance, packs and cost.Open →mortarTile Adhesive CalculatorDry mix and whole bags from area and trowel-notch coverage.Open →floorLaminate Flooring CalculatorPacks of laminate for a room, straight or diagonal.Open →wallsPlaster & Putty CalculatorDry mix and bags for levelling walls at a given layer thickness.Open →partitionsDrywall & Metal Stud CalculatorPanels and finish for a wall, room, ceiling or direct area, with optional cost.Open →wallsPaint CalculatorSeveral rooms, separate wall and ceiling paint, primer, optimal tins and cost.Open →wallsWallpaper CalculatorFull rolls, openings, pattern repeat, reserve and cost.Open →tileTile Grout CalculatorGrout weight, packs and cost from tile and joint dimensions.Open →

Work out materials before the delivery, not after

Calcrete is a set of free building material calculators. Everything runs in your browser, needs no account, and shows the working rather than just a total — the waste allowance is a separate line, so you can see exactly what you are paying for.

Structural work

The concrete calculator handles slabs, strip footings and columns, with cement, sand and gravel for grades M200 to M400. The screed calculator turns floor area and thickness into bags of dry mix. The brick calculator returns counts allowing for format, wall thickness, openings and mortar. Insulation counts slabs and packs, while roofing turns plan dimensions, overhangs and pitch into covering and trim.

Finishing

Tile is counted in tiles and packs, grout from the joint geometry and tile adhesive from area and trowel profile. Floor leveller uses average depth, laminate rounds to packs, drywall includes framing and fasteners, paint uses coat coverage, and wallpaper counts full strips and rolls.

Why area-based estimates come out short

Almost every material is sold discretely: in packs, bags and rolls. Between the calculated area and what you actually have to buy there is always a rounding up, sometimes more than one. Tile occupies its joint as well as itself, a roll of wallpaper yields a whole number of strips, and there is no such thing as a part pack of laminate. These calculators count the way the material is sold.

FAQ

Are these calculators free? expand_more

Yes — completely free, no account, no installation. Everything runs in your browser and nothing you enter is sent anywhere.

How accurate are the results? expand_more

They are based on standard consumption rates and nominal material dimensions. Actual usage depends on the manufacturer, the state of the substrate and how the work is done, so check the packaging before ordering.

Can I share a calculation? expand_more

Yes. Every calculator keeps its inputs in the address bar, so a copied link opens with exactly the numbers on your screen.