Calculate tiles needed for floors and backsplashes
This tile calculator helps you estimate the number of tiles needed for floor and backsplash projects. Enter the room or wall dimensions, tile size, grout width, and waste factor to get an accurate count. Also calculate boxes needed if you know the tiles per box.
Switch between Floor and Backsplash modes for different input options. Use inches or feet for room dimensions.
A 10% waste factor is standard for rectangular rooms with straight-lay patterns. For diagonal patterns, bathrooms with many cutouts, or large-format tiles, use 15–20%. Always buy extra tiles for future repairs.
Yes, grout lines reduce the number of tiles needed slightly. For small tiles with wide grout lines, this can make a noticeable difference. Our calculator accounts for grout width to give the most accurate estimate.