Construction & home improvement calculators
Work out tiles, paint, concrete, gravel, shingles and lumber for your project. Every calculator shows a diagram of what you entered, the formula it uses and the assumptions behind it.
Start with a calculator
- Tile CalculatorTiles and boxes for a floor from room size, tile size, joint width and waste.
- Laminate CalculatorBoxes of laminate flooring from room size or floor area, coverage per box and waste.
- Paint CalculatorGallons and cans of wall paint from room size, doors and windows, coats and coverage.
- Ceiling Paint CalculatorGallons and cans of ceiling paint for one or more rooms from ceiling size, coats and coverage.
- Drywall CalculatorDrywall sheets for a room’s walls and ceiling from room size, openings, sheet size, layers and waste.
- Concrete Slab CalculatorConcrete volume in cubic yards, cubic feet or cubic meters for rectangular slabs and pads.
- Concrete Bag CalculatorNumber of premixed concrete bags for a volume, from the bag’s yield, with total weight.
- Brick CalculatorBricks for a single-wythe wall or veneer from wall size, openings, brick size and joint.
- Gravel CalculatorGravel and crushed stone volume for an area and depth, plus weight from your supplier’s density.
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How these calculators work
- Enter your measurements in feet and inches or metres – mixed input like 12 ft 6 in works.
- Check the diagram: it redraws as you type, so a wrong dimension is easy to spot.
- Add waste and your supplier’s package size and price to get what to buy.
- Copy, print or share the result. Nothing is stored on our servers.