Enter your Room Length and Room Width alongside your Tile Length, Tile Width, and Gap Size, and the Tile Calculator figures out your Total Tiles Needed — plus Boxes Needed and Total Cost once you add Tiles per Box, Price per Box, and a Waste Factor to cover cuts and breakage.
Total Tiles Needed
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Room Area
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Tile Area
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Boxes Needed
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Total Cost
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Tile Adhesive
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Grout Needed
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Calculate your room area in square feet, then divide by the area of one tile. Add 5-20% extra for cuts, waste, and future repairs depending on your layout complexity.
For straight layouts, add 5-10%. For diagonal or complex patterns, add 15-20%. It's better to have extra tiles from the same batch for future repairs.
Standard gap sizes range from 1/16 inch to 1/2 inch. Smaller tiles typically use smaller gaps (1/16 to 1/8 inch), while larger tiles can use gaps up to 1/4 inch or more.
Convert tile dimensions to feet, then multiply length × width. For example, a 12×12 inch tile equals 1×1 foot = 1 square foot.
Adhesive typically covers the same square footage as your room area. Grout amount depends on tile size and gap width - larger gaps and smaller tiles require more grout.
For most residential projects, the standard waste factor accounts for areas around fixtures. For large openings, subtract that area from your room dimensions.
The calculation method is the same regardless of tile material. However, porcelain tiles may have slightly different sizes and you should verify actual dimensions with your specific product.
Yes, this calculator works for floors, walls, backsplashes, and shower areas. Just measure the surface area you plan to tile and use the same calculation method.