Tile Calculator
Calculate the exact number of tiles needed for your flooring, wall, or backsplash project with waste allowance.
Tile Calculator
Waste Allowance Guide
5%: Simple rectangular rooms with few cuts needed. Best for experienced installers.
10%: Standard allowance for most projects. Accounts for cuts, breakage, and future repairs.
15-20%: Recommended for diagonal layouts, complex patterns, or rooms with many obstacles.
How to Use This Tile Calculator
Our tile calculator helps you determine the exact number of tiles needed for any project. Select your project type (floor, wall, or backsplash), choose a tile size, enter your dimensions, and set your waste allowance to get accurate tile and box counts.
Common Tile Sizes
12" × 12" (1 sq ft)
The most popular floor tile size. Easy to calculate coverage and creates a classic look. Works well in any room size.
12" × 24" (2 sq ft)
Large format rectangular tiles create a modern, spacious look. Fewer grout lines and less visible seams.
3" × 6" Subway
Classic subway tile for backsplashes and wall applications. Timeless design that works with any style.
18" × 18"
Popular for larger rooms and open floor plans. Reduces the number of grout lines while being easier to handle than 24" tiles.
4" × 4"
Small format tile ideal for accent areas, borders, and detailed patterns. Common for bathroom walls.
24" × 24"
Extra-large format for contemporary spaces. Minimizes grout lines but requires flat, level subfloors.
How Many Tiles Do I Need?
To calculate tiles needed, follow this formula:
Tiles = (Room Area ÷ Tile Area) × (1 + Waste %)For example, a 150 sq ft room with 12"×12" tiles at 10% waste:
- Room area: 150 sq ft
- Tile area: 1 sq ft (12" × 12")
- Tiles needed: 150 × 1.10 = 165 tiles
Why Add Waste Allowance?
Extra tiles are essential for several reasons:
- Cutting and fitting: Tiles must be cut at walls, corners, and around obstacles. Partial tiles are often unusable.
- Breakage during installation: Tiles can crack during cutting or handling.
- Manufacturing defects: Some tiles may have chips, color variations, or other flaws.
- Future repairs: Keep extras for replacing damaged tiles years later. Matching discontinued tiles is difficult.
- Pattern matching: Complex patterns may require more waste to maintain alignment.
Tips for Ordering Tiles
- Order from the same lot: Tiles from different production lots may have subtle color variations.
- Keep extra boxes: Store 1-2 extra boxes for future repairs. Mark them with the purchase date and lot number.
- Check return policies: Many stores allow returns of unopened boxes within a certain time frame.
- Consider layout: Diagonal patterns typically require 15-20% extra, while straight layouts need 10%.
- Measure twice: Double-check room dimensions and account for closets, islands, and built-ins.