Tile Calculator (Floor & Wall Tile Estimator)
Tile Calculator for Floor & Wall (m² and sq ft)
Last updated: March 2026
📐 Area Dimensions
🏠 Let me save you from a costly tile mistake...
I learned this lesson the hard way. My first bathroom remodel? I calculated tiles perfectly. Or so I thought. When the tiles arrived, I was 15% short. Why? I forgot about cuts, patterns, and breakage. Had to wait 2 weeks for more tiles. The supplier? Different dye lot. The new tiles didn't match. I ended up redoing half the floor.
That's why I built this calculator. Tile estimation isn't just length × width. You need to account for:
- Cuts at walls and corners — especially on diagonal patterns
- Breakage during installation — tiles crack, especially porcelain
- Pattern matching — herringbone uses 15-20% more tile
- Future repairs — keep extra tiles for replacements
This calculator adds 10% waste by default — the industry standard. But for diagonal layouts or small spaces, increase it to 15-20%.
— Nasir (home renovator, learned about waste factor the expensive way)
📖 How to Use This Tile Calculator
- Measure your room — Length and width in feet or meters
- Select your tile size — Common sizes from 300×300mm to 800×800mm
- Enter tiles per box — Usually 5-12 tiles depending on size
- Click calculate — Get total tiles, boxes, and 10% waste factor included
💡 Pro tip: For herringbone or diagonal patterns, increase waste to 15-20% manually. For small bathrooms with many cuts, add 15%.
📊 Common Tile Sizes & Coverage Guide
| Tile Size | Area per Tile | Tiles per m² | Best For |
|---|---|---|---|
| 300×300 mm | 0.09 m² | 11.1 | Bathrooms, small spaces |
| 450×450 mm | 0.20 m² | 5.0 | Kitchens, medium rooms |
| 600×600 mm | 0.36 m² | 2.8 | Living rooms, large areas |
| 600×300 mm | 0.18 m² | 5.6 | Rectangular, modern look |
| 800×800 mm | 0.64 m² | 1.6 | Commercial, large format |
| 1200×600 mm | 0.72 m² | 1.4 | Open plan, luxury homes |
💡 5 Tile Installation Tips I Wish I Knew
- Buy 10-15% extra tiles minimum. I've never finished a job with exactly the calculated number. Cuts, cracks, and mistakes happen.
- Check dye lots before buying. Tiles from different batches can look different. Buy all at once or verify same lot numbers.
- Lay out tiles before grouting. Dry lay a small section to see how cuts land and adjust your layout to avoid sliver cuts.
- Add 5% more for diagonal patterns. Diagonal layouts create more waste at edges. This calculator assumes straight lay.
- Keep spare tiles. Store 2-3 extra tiles. If one cracks later, you'll have a match instead of hunting for discontinued stock.
- Room shape (L-shaped, curved walls, alcoves)
- Tile cut waste (more cuts = more waste)
- Installation pattern (herringbone, basketweave, diagonal)
- Grout line thickness
Always consult with a professional tiler for accurate project estimates.
📐 How This Tile Calculator Works
The calculator finds total floor or wall area, divides it by tile coverage area, and adds 10% extra tiles to cover cuts and waste — the industry standard recommended by tile manufacturers and professional installers.
The Formula:
- Total Area = Length × Width (converted to meters if needed)
- Tiles Needed = Total Area ÷ Tile Area (rounded up)
- Waste Allowance = Tiles Needed × 10%
- Boxes Required = (Tiles Needed + Waste) ÷ Tiles per Box (rounded up)
For irregular rooms, measure in sections and add each area separately, then use the total in this calculator.
Tile Calculation Formula
Tiles required = Total Area ÷ Tile Area
Total tiles with waste = Tiles required × (1 + waste %)
❓ Frequently Asked Questions
How does a tile calculator work in square feet?
A tile calculator square feet measures floor length and width in feet, multiplies them to get total area, and then calculates the number of tiles required.
How does a tile calculator work in square meters?
A tile calculator square meters calculates area in square meters and divides it by the tile size to estimate the total number of tiles needed.
What is the floor tiles calculation formula?
The basic floor tiles calculation formula is: Total Floor Area ÷ Area of One Tile = Number of Tiles Required.
What is a floor tile calculator?
A floor tile calculator is an online tool that helps estimate how many tiles are needed for flooring projects accurately and quickly.
Why do I need extra tiles for waste?
Extra tiles account for cuts at walls and corners, breakage during installation, and future repairs. Industry standard is 10% for straight layouts and 15-20% for diagonal or complex patterns.
How do I measure an L-shaped room?
Divide the L-shaped room into two rectangles. Calculate each rectangle separately, then add both areas together. Use the total area in this calculator.
"After completing 10+ tiling projects, I rely on this tile calculator every time. It helps accurately estimate floor and wall tile quantities and prevents costly material waste."
Founder, MultiTooSite
10+ years experience in construction and estimation tools
© 2026 MultiTooSite – Free Tile Calculator for Flooring & Wall Projects. All rights reserved.
This calculator is for estimation purposes only. Always verify measurements and consult professional tilers for your specific project.