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Flooring & Tile Calculators

Flooring, tile, carpet, grout and trim quantities.

Floor coverings are sold by the box, the roll, the tile or the linear foot, so the same room needs a different count for laminate, carpet, tile and trim. Each calculator here starts from the room dimensions and works in the product's own unit, including the waste for cuts along walls and around doorways.

Waste is the number people get wrong. Straight layouts need 10 percent; diagonal, herringbone and rooms with many alcoves need 15 percent. Dye lots vary between production runs, so buy every box for a job at once and keep a spare for repairs.

All flooring & tile calculators

Flooring CalculatorFind out how much flooring you need in square feet and how many boxes of laminate, vinyl plank, hardwood or engineered flooring to buy, including waste.Tile CalculatorCalculate how many tiles you need for a floor, wall or backsplash. Enter the area, tile size and grout gap to get tile count, boxes and square footage with waste.Laminate Flooring CalculatorCalculate how many boxes of laminate flooring you need for a room, plus the rolls of underlayment and the quarter round or trim to finish the edges.Vinyl Plank Flooring CalculatorCalculate how many vinyl plank boards and boxes you need for a room from the plank size and planks per box, with 10% waste and an optional cost estimate.Hardwood Flooring CalculatorCalculate how much hardwood flooring you need in square feet, boxes and linear feet of boards, plus the flooring cleats and underlayment paper for the job.Carpet CalculatorCalculate how much carpet to order in linear feet of roll and square yards, based on the room size and a 12, 13.5 or 15 ft roll width, plus padding and cost.Grout CalculatorCalculate how many pounds and bags of grout you need from the tile size, tile thickness, joint width and area. Works for floors, walls and backsplashes.Thinset CalculatorCalculate how many 50 lb bags of thinset mortar you need from the tile area and trowel notch size, with an allowance for back-buttering large format tile.Baseboard CalculatorCalculate how many linear feet of baseboard you need for a room after deducting doorways, how many 8, 12 or 16 ft pieces to buy, plus corners and nails.Epoxy Floor CalculatorCalculate how many gallons of epoxy floor coating you need for a garage or basement from the floor size, number of coats and coverage per gallon, plus kits and flakes.Backsplash CalculatorCalculate how many tiles you need for a kitchen backsplash from the counter length and height, plus the square footage to buy, boxes, tile adhesive and cost.Countertop CalculatorCalculate countertop square footage from the counter run, depth, island and backsplash, then see how many quartz, granite or laminate slabs you need and the cost.

A typical project, in order

Carry each result into the next tool.

  1. 1Square Footage CalculatorMeasure the room, including closets
  2. 2Plywood CalculatorSubfloor or underlayment sheets
  3. 3Flooring CalculatorBoxes of laminate, vinyl or hardwood
  4. 4Tile CalculatorTiles, then thinset and grout below
  5. 5Thinset CalculatorBags of mortar by trowel size
  6. 6Grout CalculatorPounds of grout for the joints
  7. 7Baseboard CalculatorTrim to finish the edges

Flooring & Tile questions

How much extra flooring should I buy?

10% for straight layouts, 15% for diagonal or patterned layouts and for large-format tile that chips easily. Round up to whole boxes.

How do I measure an irregular room for flooring?

Split it into rectangles, calculate each, and add them together. Include closets and the doorway thresholds you plan to cover.

Is tile measured differently from plank flooring?

Yes. Plank flooring is bought by square feet per box, while tile is counted by the piece from the tile size plus its grout joint, then converted to boxes.