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How Many Tiles Do You Need?

Calculate the number of tiles needed for floors, walls, and backsplashes. Includes grout lines, cuts, and waste factor.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

Facteurs de Chute

Pose droite : 10% de chutes. Diagonale : 15%. Chevron : 20%. Débutants : ajoutez 5% en plus. 10 m² avec carreaux 30×60 en diagonale : 10 × 1,15 = 11,5 m² de carreaux. Achetez toujours du même lot de production — les lots différents ont des variations de couleur visibles.

Taille et Proportion

Les grands carreaux (60×60) font paraître les petits espaces plus grands (moins de joints). Mais ils nécessitent un sol parfaitement nivelé. Pour les salles de bain : le format 30×60 est le meilleur compromis — look moderne, coupes gérables, tolérant aux sols légèrement irréguliers.

⚡ CalcWolf Insight

The most common DIY tiling mistake: not back-buttering large-format tiles (12×24 and bigger). Apply thinset to both the floor AND the back of the tile, then comb one surface. This ensures 95%+ mortar coverage, preventing hollow spots that crack under foot traffic.

Frequently asked questions
Combien de m² commander ?▾
Surface + 10-15% selon le motif. Pose diagonale = 15%. Chevron = 20%. Toujours commander du même lot de fabrication.
Quel format pour une petite salle de bain ?▾
30×60 ou 45×45 cm. Moins de joints = espace visuellement plus grand.
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Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
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