Tiles Needed
Tiles = Floor Area ÷ Tile Area Floor Area in m², Tile Area = L × W
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Calculate number of tiles needed with waste factor.
Tiles = Floor Area / Tile Area × (1 + Waste%)
Use the Tile Quantity Calculator for accurate calculations.
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Calculate tile quantities for floors and walls including grout requirements. Supports multiple tile sizes with waste factor. Free construction calculator.
Typical: 2-5mm
Typical: 3-8mm
Range: 5-15% (typical 5-15%)
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Professional-grade tile estimation with grout volume, waste buffer, and multi-unit support.
10–15%
Standard Waste Buffer
±2%
Calculation Accuracy
60%
Errors from Poor Planning
20%+
Diagonal Layout Extra
Reviewed by construction professionals · TCNA & ANSI A108 aligned · Updated 2025
A tile quantity calculator computes the exact number of tiles needed for a floor or wall project. It accounts for tile dimensions, room area, grout joint width, and an adjustable waste factor so you never under-order or dramatically over-spend.
Professional installers always add a waste buffer—typically 10–15%—because tiles crack during cutting, patterns require border adjustments, and you need spares for future repairs. Larger diagonal or herringbone patterns raise the buffer to 15–20%.
This calculator also computes grout volume using joint width, joint depth, and tile perimeter, giving you a complete material list before you visit the tile shop.
Tiles = Floor Area ÷ Tile Area Floor Area in m², Tile Area = L × W
Tiles with Waste = Tiles × (1 + WF%) WF = waste factor (0.10–0.20)
V = Joint Length × Width × Depth Joint Length ≈ perimeter of all tiles
Round up to nearest full box Box tiles = Box coverage ÷ Tile area
| Tile Type | Size Range | Best For | Waste Factor |
|---|---|---|---|
| Ceramic | 10×10 – 30×30 cm | Walls, low-traffic floors | 10–12% |
| Porcelain | 30×30 – 90×90 cm | High-traffic floors, exterior | 10–15% |
| Mosaic | 2×2 – 10×10 cm | Backsplash, accent walls | 15–20% |
| Natural Stone | 30×30 – 60×60 cm | Luxury floors, bathrooms | 15–20% |
| Large Format | 60×60 – 120×240 cm | Open-plan floors, feature walls | 12–18% |
8000 BCE: Ancient Anatolia: First fired-clay tiles used in building construction and decorative floors.
600 BCE: Persian Empire: Glazed polychrome brick and tile art flourished in palaces of Persepolis.
100 BCE: Roman mosaics: Meticulous stone tesserae calculations required early area estimation techniques.
1200s: Medieval Europe: Encaustic floor tiles in cathedrals drove demand for standardised tiling grids.
1840s: Victorian era: Industrial production and standardised tile sizes enabled mass-quantity estimation.
Modern era: Digital tile calculators and BIM software allow sub-1% estimation accuracy on complex projects.
Tile Council of North America — installation methods and waste standards.
American National Standard for tile installation — grout and adhesive specs.
Slip resistance test methods for ceramic tile — safety compliance.
VOC and indoor air quality considerations for tile adhesives and grout.
Myth: Buy exactly the tile count you calculate.
Fact: Always add 10–15% for cuts, breakage, and future repairs. Running short mid-project can cause colour-lot mismatches.
Myth: All tiles of the same nominal size are identical.
Fact: Non-rectified tiles have dimensional tolerances of ±1–2 mm. Check calibre markings and order from the same lot.
Myth: Grout quantity is negligible.
Fact: On mosaic tiles with 2 mm joints, grout can weigh more than the tiles. Always calculate grout volume separately.
Myth: Diagonal patterns only need 5% extra.
Fact: Diagonal layouts require 15–20% extra because all border tiles are cut at 45°, generating far more waste.
Order 10–15% extra for standard layouts. For diagonal or herringbone patterns, add 15–20% due to greater edge cuts. Always round up to the nearest full box.
The waste factor accounts for cuts at room edges, broken tiles, pattern adjustments, and future repairs. A 10% factor is standard; increase to 15–20% for complex patterns or irregular rooms.
Tile area = tile length × tile width. If your tile is 30 cm × 30 cm, each tile covers 0.09 m². Divide floor area by tile area and add waste buffer to get total tiles needed.
Rectified tiles (precision-cut edges) can use 1.5–3 mm joints. Non-rectified tiles need 3–5 mm. Mosaic tiles often use 1.5–2 mm. Larger joints mean more grout volume.
Yes. Larger tiles produce fewer cuts but waste more at borders. Small mosaic tiles can contour curves but take longer to install. Always recalculate tile count when switching sizes.
Divide the room into rectangles. Calculate each area separately and sum them. For L-shaped rooms, subtract the missing corner. Add 5–10% for complex irregular perimeters.
Concepts are the same—area divided by tile area plus waste. Wall tiles need extra for cut-outs around outlets, windows, and corners. Add 15% waste for wall installations.
Grout volume depends on joint width, depth, and tile size. A 30×30 cm tile with a 3 mm joint needs roughly 0.4–0.6 kg of grout per m². Use our calculator for exact figures.
Yes. Toggle between metric (cm/m) and imperial (inches/feet) in the unit system selector. All dimensions, areas, and grout volumes are converted automatically.
Standard floor tiles are 8–12 mm thick and wall tiles 6–9 mm. Grout depth is typically 2/3 of tile thickness. Our calculator uses an adjustable grout depth field.
Measure the wall width × height. Subtract window and door areas. Apply a 15% waste factor for the cuts around fixtures. Calculate grout the same way as for floors.
Box coverage varies by tile size. A box of 30×30 cm tiles (usually 10–12 tiles) covers about 0.9–1.08 m². Check the manufacturer label; our calculator works with individual tile dimensions.
Combine tile quantity with concrete, paint coverage, and brick calculators for complete project material estimation.
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