Walls, Floors & Roof Calculators
Measure walls, floors and roofs for paint, drywall, tile, flooring, siding and shingles — in gallons, sheets, boxes and squares — plus countertops, trim, caulk and the cost to build a house.
32 calculators · A–Z of all calculators
- Paint CalculatorGallons of paint for walls and ceilings, with doors, windows and coats.
- Drywall CalculatorSheets of drywall for walls and ceilings, 4×8 to 4×12.
- Tile CalculatorTiles and boxes for floors, walls and backsplashes, with grout joints and extra for cuts.
- Grout CalculatorPounds and bags of tile grout by tile size, joint and thickness.
- Caulk CalculatorFeet per tube and tubes of caulk for any joint size.
- Laminate Flooring CalculatorBoxes of laminate for any room, plus underlayment.
- Flooring CalculatorSquare feet and boxes of vinyl plank, laminate or hardwood, plus underlayment.
- Countertop CalculatorSquare feet of counters, islands and backsplash, slabs and cost.
- Epoxy CalculatorGallons of epoxy for floor coatings and table or river pours.
- Carpet CalculatorSquare yards of carpet and pad for rooms and stairs.
- Wallpaper CalculatorRolls of wallpaper for rooms and walls, with the pattern repeat.
- Board and Batten CalculatorBatten spacing and lumber for an accent wall, or boards for siding.
- Roof CalculatorSquares and bundles of shingles by roof pitch, plus underlayment.
- Metal Roofing CalculatorMetal roof panels and their cut length, squares and trim.
- Gutter CalculatorFeet of gutter, downspouts, elbows and hangers for every run.
- Siding CalculatorSquares of siding for walls and gables, doors and windows taken out.
- Roof Pitch CalculatorPitch, angle, grade and rafter length from rise and run.
- Rafter Length CalculatorCommon rafter length from run and pitch.
- Insulation CalculatorR-value by climate zone and bags or rolls for attics, floors and walls.
- Attic Ventilation CalculatorNet free vent area by the IRC.
- Egress Window CalculatorCheck IRC egress window size.
- Baseboard CalculatorLinear feet and 8, 12 or 16 ft pieces of baseboard for any room.
- Crown Molding Angle CalculatorMiter and bevel settings for crown.
- Square Footage CalculatorSquare feet, yards, acres and meters for any shape, with cost.
- Square Yards CalculatorSquare yards for rooms and areas of any shape, with the cost per square yard.
- Cost to Build a House CalculatorHouse price estimate from its size and 2025 Census cost per square foot.
- Spray Foam CalculatorBoard feet of open- or closed-cell spray foam and kits, by thickness or R-value.
- Stucco CalculatorBags of base and finish coat stucco for your walls, three or two coats.
- Shiplap CalculatorBoards, linear feet and rows of shiplap for walls and ceilings.
- Rough Opening CalculatorRough opening for a door, window or patio door from the maker's allowance.
- Wainscoting Calculator4x8 sheets or boards, cap rail, baseboard and paint area for wainscoting.
- Room Illuminance CalculatorLumens needed to light a room to a foot-candle or lux level, with CU and LLF.
Projects that use them
Finish a room
Insulate an attic
Tile a bathroom