Tile Calculator – How Many Tiles Do You Need?

Measure the longest length and widest width, even if the room isn't perfectly rectangular. For L-shaped rooms, split into rectangles and add the areas. Don't subtract for cabinets or islands – you need tile under them for proper height matching.

Yes, always. Tiles from different production batches can have slight color variations (dye lot differences). Buy everything you need plus 10-15% extra in one purchase. Keep spare tiles for future repairs – finding an exact match years later is nearly impossible.

Rough estimate: 1 kg of grout per m² for standard 3mm joints. Larger tiles with wider joints need more. A 25kg bag typically covers 20-30 m² of floor tile. Your tile supplier can calculate exact amounts based on tile size and joint width.

Porcelain is denser, fired at higher temperatures, and absorbs less than 0.5% water. Ceramic is more porous and softer. Porcelain works outdoors and in wet areas; ceramic is fine for interior walls. Porcelain costs more but lasts longer.

Sometimes. The existing tile must be firmly attached, level, and clean. You'll need a specialty primer and thin-set mortar designed for tile-over-tile. Height buildup is the main issue – doors may need trimming, and transitions to other floors become awkward.