Tile Calculator
Calculate the number of tiles, adhesive, and grout needed for flooring or wall tiling projects.
A tile calculator determines how many tiles and boxes you need to cover a floor or wall area, accounting for grout gaps and wastage from cuts.
Examples
10x10 ft room with 12x12 inch tiles
Frequently Asked Questions
How much wastage should I plan for?
What grout gap width should I use?
Quick Tips
- •Always round up when ordering materials -- running short is more expensive than having extra.
- •Dry-lay a row of tiles before applying adhesive to verify spacing and identify any needed cuts.
- •Keep a few spare tiles from the same lot for future repairs, as colors can vary between production runs.
A tile calculator determines how many tiles and boxes you need to cover a floor or wall area, accounting for grout gaps and wastage from cuts.
How to Use This Calculator
Enter the area dimensions in feet, tile dimensions in inches, grout gap width, and expected wastage percentage. The calculator determines how many tiles you need to purchase.
Understanding the Formula
Effective Tile Area = (Tile Length + Gap) x (Tile Width + Gap) in sq ft. Tiles Needed = Floor Area / Effective Tile Area. Total = Tiles + Wastage.
Examples
10x10 ft room with 12x12 inch tiles
Area: 100 sq ft. Effective tile: 12.125" x 12.125" = 1.021 sq ft. Tiles: 98. With 10% waste: 108 tiles total.
Frequently Asked Questions
How much wastage should I plan for?
Standard rectangular layouts need 10% extra. Diagonal patterns need 15%. Complex patterns or small rooms with many cuts may need up to 20%.
What grout gap width should I use?
Standard grout joints are 1/16" to 1/8" (0.0625 to 0.125 inches) for rectified tiles. Natural stone and larger tiles often use 1/8" to 3/16" gaps.
Assumptions & Limitations
- Add 5-10% extra material for waste and cuts.
- Assumes a standard rectangular grid layout; diagonal or herringbone patterns increase waste significantly.
- Box quantity assumes 10 tiles per box; check your specific product packaging for actual count.