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Tile Calculator

Calculate tiles needed for floors or walls including waste.

Last updated: June 13, 2026

Calculator

Area Length

feet

Area Width

feet

Tile Size

Waste Factor

Results

Tiles Needed88

12 x 12 inch tiles

Area80.0 sq ft

Boxes (est)8

~12 tiles per box

Waste Included10%

How to Use This Calculator

1Enter the area length in feet.
2Enter the area width in feet.
3Enter the tile size in inches.
4View total tiles needed with waste factor.

Formula Explanation

The number of tiles is calculated by dividing the total area by the area of each tile, then adding a waste percentage for cuts and breakage.

Area = Length × Width Tile Area = (Tile Size)² ÷ 144 (convert to sq ft) Tiles = (Area ÷ Tile Area) × (1 + Waste%)

Variables:

AreaFloor or wall area in sq ft

Tile SizeTile dimensions in inches

Waste%Extra tiles for cuts and breakage (10-15%)

Worked Examples

10×12 ft floor, 12-inch tiles, 10% waste

1. Area = 10 × 12 = 120 sq ft
2. Each 12" tile = 1 sq ft
3. Base tiles = 120
4. With 10% waste = 132 tiles

Result: 132 tiles needed (including waste)

Why Use This Calculator

Calculate exact tile quantities.
Avoid running short mid-project.
Account for cuts and breakage.
Budget accurately for your tiling project.

336 × 280 Large Rectangle

300 × 250 Medium Rectangle

Tips & Best Practices

Larger tiles mean fewer grout lines and a more modern look, but more waste on cuts.
Buy 10-15% extra — diagonal layouts and complex shapes waste more tiles.
Keep a few spare tiles for future repairs (matching discontinued tiles is nearly impossible).
Tiles at walls and edges almost always need cutting — factor this into your waste calculation.

Common Mistakes to Avoid

❌ Not buying enough extra tiles for cuts at edges.

✅ Every wall edge requires cut tiles. Add at least 10% extra for straight layouts and 15% for diagonal patterns.

❌ Assuming all tiles in a box are usable.

✅ A small percentage of tiles may have defects. Inspect tiles before installing and keep extras from the same lot for replacements.

Frequently Asked Questions

How much tile waste should I plan for?

10% for simple rectangular rooms with straight layouts. 15% for diagonal installations, small rooms (more edge cuts), or complex shapes. 20% for natural stone.

What size tile is best for small rooms?

Large format tiles (12×24 or larger) can make small rooms appear bigger by reducing grout lines. However, there is more waste from cuts in small spaces.

336 × 280 Large Rectangle

300 × 250 Medium Rectangle

Embed This Calculator

Add the Tile Calculator to your website for free. Copy the code below and paste it into your HTML.

Width

Height

<iframe src="https://redicalc.com/embed/home/tile-calculator" width="100%" height="600" style="border:none;border-radius:12px;box-shadow:0 1px 3px rgba(0,0,0,0.1);" title="Tile Calculator — RediCalc.com" loading="lazy" allowtransparency="true"></iframe>

Preview embedFree to use · Attribution link included

Disclaimer: This calculator is provided for informational and educational purposes only. Results are estimates and should not be used as a substitute for professional advice. RediCalc.com makes no guarantees regarding the accuracy, completeness, or suitability of any calculations. Always consult a qualified professional before making financial, health, construction, or other important decisions.

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