How do I calculate tiles needed?

Calculate area (length × width), divide by tile size. 12×12" tiles: 1 tile per sq ft. 18×18": 0.44 tiles per sq ft. 6×6": 4 tiles per sq ft. Add 10-15% waste for cuts and breakage.

What tile size should I use?

12×12": most common, standard rooms. 18×18" or larger: makes small rooms look bigger. 6×6" or smaller: bathrooms, decorative. Larger tiles = fewer grout lines but more waste on cuts.

How much does tile cost?

Ceramic: $1-5/sq ft. Porcelain: $3-10/sq ft. Natural stone: $5-15/sq ft. Glass/mosaic: $10-30/sq ft. Installation adds $5-15/sq ft depending on complexity and location.

What else do I need besides tiles?

Thinset mortar (50 sq ft per bag), grout (100 sq ft per pound), spacers, backer board (for floors), sealer (for stone), trim pieces, transition strips.

How much extra tile should I buy?

10% waste minimum for straight lay. 15% for diagonal or brick pattern. 20% for herringbone or complex patterns. Keep 5-10 extra tiles for future repairs - batches vary in color.

Tile Calculator

Calculate tiles, thinset, and grout needed

Tile Calculator

Calculate tiles needed for your floor or wall project. Get tile counts, thinset, grout requirements, and cost estimates.

Room Dimensions

Room Length *

Length of the area to tile

Room Width *

Width of the area to tile

Tile Size

Tile Length *

Common: 12, 16, or 24 inches

Tile Width *

Common: 12, 16, or 24 inches

Waste Factor

10% standard, 15% for diagonal or complex patterns

Tile Installation Guide

Common tile sizes are 12×12, 16×16, and 24×24 inches. Larger tiles cover more area faster but require flatter subfloors. Always add 10% waste for straight layouts and 15% for diagonal or herringbone patterns.

One 50lb bag of thinset covers 50-60 square feet at recommended thickness. Grout coverage depends on tile size and grout joint width. Standard 1/8 inch joints require about 1/3 lb of grout per square foot for 12×12 tiles.

Frequently Asked Questions

Everything you need to know about this tool