Calculate tiles, grout, and materials needed
A tile calculator determines the number of tiles, grout, and materials needed for floors, walls, backsplashes, and showers. Pattern type significantly affects material needs.
Tiles Needed = (Area / Tile Size) × Waste Factor
Straight pattern: 10% waste. Diagonal: 15% waste. Herringbone: 20% waste. Complex layouts or expensive tile: 25% for safety. Keep extras for future repairs.
1/16": Rectified tiles, minimal grout look. 1/8": Standard for most tile. 3/16": Rustic or uneven tiles. 1/4" or more: Handmade or irregular tiles. Wider grout lines are more forgiving for DIY.
Grout coverage varies by tile size and grout width. Small mosaic tiles use more grout than large format tiles. A 25 lb bag covers roughly 50-100 sq ft depending on these factors.
Sanded grout: For joints 1/8" or wider. More durable, less shrinkage. Unsanded grout: For joints under 1/8". Smoother finish, won't scratch polished surfaces. Use unsanded for glass tile.
Measure wall height × width for each wall. Subtract window and door areas. Add areas together. Apply waste factor. Remember to account for bullnose or edge tiles.
Yes, spacers ensure consistent grout lines and professional results. Choose size matching your desired grout width. Remove before grouting. Leveling clips are recommended for large format tiles.