Calculate how many tiles you need for floors, walls, or backsplashes with grout spacing and waste factor.
| Tile Size | Best For | Coverage per Tile |
|---|---|---|
| 4×4 in | Backsplashes, accents | 0.11 sq ft |
| 12×12 in | Floors, walls | 1.0 sq ft |
| 12×24 in | Modern floors | 2.0 sq ft |
| 24×24 in | Large open floors | 4.0 sq ft |
Roughly 1 lb of sanded grout per 10 sq ft for 12×12 tiles with 1/8" joints. Larger joints or smaller tiles need more.
Always buy 10-15% extra. Some tiles break, patterns require cuts, and having spares for future repairs is essential — dye lots vary.
Try this related calculator.
Open →Try this related calculator.
Open →Try this related calculator.
Open →Enter the area dimensions and tile size with grout width. The calculator estimates tiles needed, grout, and thin-set mortar, including waste.
Tile coverage = tile width × tile height. Tiles needed = Area / (Tile coverage + grout lines) × Waste Factor (1.10 for straight, 1.15 for diagonal).
Bathroom floor 8×10 ft = 80 sq ft. Using 12×12" tiles with 1/8" grout: 80 tiles + 10% waste = 88 tiles. Thin-set: ~25 lbs per 25 sq ft, grout: ~10 lbs.
Buy 10-15% extra tiles and keep leftovers for future repairs (matching tiles later is nearly impossible). Larger tiles make small rooms look bigger. Use a laser level for your first row — it sets the alignment for everything.