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HomeconstructionTile Calculator

Tile Calculator

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Estimate tile count, boxes, square footage, waste factor, and flooring material cost for bathroom, kitchen, or any room renovation.

Planning a bathroom or kitchen renovation? Enter room dimensions, tile size, waste factor (10–20%), and price per square foot — get tile count, box quantity, total area, and material cost. One of the highest-intent home improvement searches before every remodel.

Diagonal layouts and complex patterns need 15–20% waste; straight lay uses 10%. The calculator rounds up to whole tiles and boxes so you do not run short mid-installation — nothing worse than a discontinued tile color halfway through a shower.

Works in feet/inches or meters/centimeters. Also useful for estimating laminate, vinyl plank, or any square-foot-priced flooring sold by the box or pallet.

Standard 12×12 in tiles: a 5×8 ft bathroom floor (40 sq ft) needs roughly 44 tiles at 10% waste. Larger format tiles (24×24) cover more area per piece but require more cuts on small rooms.

Buy one extra box for future repairs — store it in a dry place in case tiles are discontinued. Grout and thinset are separate; budget 10–15% of tile cost for setting materials.

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Tile quantity, boxes, and flooring cost for your renovation.

Formula

Area = length × width · Tiles needed = (area ÷ tile area) × (1 + waste%) · Boxes = ceil(tiles ÷ tiles per box)

Common Uses

  • Bathroom shower and floor tile estimates
  • Kitchen backsplash tile counts
  • Compare ceramic vs. porcelain budget
  • Flooring renovation material shopping lists
  • Contractor quote verification
  • Vinyl plank and laminate box quantities
  • Plan diagonal or herringbone layouts with higher waste

How to Use the Tile Calculator

  1. 1

    Enter room dimensions

    Input the length and width of the area to tile.

  2. 2

    Enter tile dimensions

    Specify the size of each tile.

  3. 3

    Set waste factor

    Choose a waste percentage (10–20%).

  4. 4

    View tiles needed

    See total tiles, boxes, and square footage.

💡 Tips & Tricks

  • Buy all tiles from the same lot number to ensure color consistency.
  • Large format tiles make small rooms look bigger.
  • Start tiling from the center of the room for a balanced layout.

Frequently Asked Questions

How do I calculate tiles needed?
Divide the total area by the area of one tile. Add 10% for waste (cuts, breakage). For example: 100 sq ft room ÷ 1 sq ft tile = 100 tiles + 10 waste = 110 tiles needed.
What waste factor should I use?
Standard rooms: 10% waste. Diagonal/herringbone patterns: 15%. Complex layouts or small tiles: 15–20%. Keep extra tiles for future repairs.
How do I account for grout spacing?
Grout lines add to the effective tile size. A 12" tile with 1/4" grout is effectively 12.25". For most calculations, the grout width has minimal impact on quantity.
How much grout do I need?
Grout coverage depends on tile size and grout width. A 25-lb bag of unsanded grout covers approximately 200 sq ft of 12×12 tiles with 1/8" joints.