Walls, Floors & Roofs
Paint, drywall, flooring, tile, carpet, roofing, siding, insulation and more for interior and exterior projects.
Square Footage CalculatorArea of rooms, lots and irregular shapes in sq ft, sq yd and sq m.Paint CalculatorGallons of paint for walls, ceilings and trim, minus openings.Roofing CalculatorRoof area, squares, shingle bundles and accessories from pitch.Drywall CalculatorSheets, screws, tape and joint compound for a room.Tile CalculatorTiles, boxes, grout and thinset for floors, walls and backsplashes.Deck CalculatorDecking boards, joists, screws and footings for a deck.Wallpaper CalculatorRolls of wallpaper for a room, allowing for pattern waste.Siding CalculatorSquares and pieces of vinyl, fiber cement or wood siding.Flooring CalculatorSquare feet, boxes and cost with a waste allowance.Insulation CalculatorBatts and packages of insulation for walls, attics and floors.Carpet CalculatorCarpet and padding in square yards, using the roll width.Baseboard & Trim CalculatorLinear feet and pieces of baseboard, crown or trim.
Measure once, buy once
Interior and exterior finishes are priced by area, so every estimate begins with square footage. Measure each surface, subtract large openings like doors and windows, then add waste: about 10% for most materials and 15% for diagonal or patterned layouts.
Always round up to whole boxes, rolls, bundles or gallons, and keep one spare box for future repairs — products are discontinued and dye lots change.