# Tile Calculator

- **URL:** https://codeasystem.com/calculators/construction/tile-calculator/
- **Category:** construction
- **Description:** Count how many tiles fill a floor or wall, including a waste allowance for cuts, breakage and future spares.
- **Primary output:** Tiles needed (10% waste included): 110 tiles

## Inputs
- Area to tile (name: `area`, type: number, example: 100)
- Tile length (name: `tileLength`, type: number, example: 12)
- Tile width (name: `tileWidth`, type: number, example: 12)
- Waste allowance (name: `waste`, type: number, example: 10)

## Outputs
- Tiles needed (10% waste included): 110 tiles
- Tiles without waste: 100 tiles
- Area covered per tile: 1 sq ft
- Boxes of 10 (rounded up): 11 boxes

## Formula / methodology
```
Tiles = ⌈ Area × (1 + waste%) ÷ (Tile L(in) × Tile W(in) / 144) ⌉
```

Each tile covers its length times width divided by 144 (square inches per square foot). The area inflated by the waste percentage is divided by that per-tile coverage and rounded up to whole tiles; boxes follow as boxes-of-ten.

## Assumptions & limitations
- Flat rectangular installation area.
- Waste covers cuts around edges, breakage and a few spares.
- Diagonal or herringbone layouts need closer to 15–20% waste than 10%.

## How to use
1. **Measure the area**; Multiply length by width of each space and add them together for odd-shaped rooms.
2. **Enter tile dimensions**; Use the face dimensions printed on the box; 12×24 plank and 2×2 mosaic behave very differently.
3. **Set waste and buy**; Keep 10% for straight layouts, raise it for diagonals. Round the final count up to full boxes.

## Example
Tiling 100 sq ft with 12"×12" tiles and 10% waste: 110 effective sq ft ÷ 1 sq ft per tile = exactly 110 tiles, or 11 boxes of ten.

Result for these inputs:

```
Tiles needed (10% waste included): 110 tiles
```

## About this calculator
### Why waste is not optional

Every field cuts tiles at edges, and every job loses a few to snap mistakes. Running one tile short mid-project means a second shipment from a different dye lot; visibly off-color next to the original. The waste allowance is insurance against both.

### Big tiles, big surprises

Large-format planks look fast but generate proportionally larger offcuts in small rooms; mosaics come mesh-backed so their sheet size, not individual tile size, drives cutting. Measure twice for patterned layouts where matching shifts everything.

### Keep spares

Styles get discontinued constantly. Stashing one box from every job gives you free repairs for cracked tiles years later; arguably the cheapest insurance in home improvement.

## FAQs
### How much extra tile should I buy?

10% suits straight layouts in rectangular rooms; 15–20% for diagonal, herringbone, or many corners and jogs.

### Do grout lines change the count?

Slightly; grout joints usually offset tile size, but the standard practice of rounding up absorbs the difference.

### Are tiles sold individually?

Mostly by the box. Use the boxes-of-ten row as a starting point, then confirm actual pieces-per-box on the product listing.

### Does underlayment or thinset matter here?

Not for tile count; but thinset and grout quantities do scale with tile size and joint width, so budget them separately.

## Related calculators
- [Paint Calculator](https://codeasystem.com/calculators/construction/paint-calculator/)
- [Square Footage Calculator](https://codeasystem.com/calculators/construction/square-footage-calculator/)
- [Area Unit Converter](https://codeasystem.com/calculators/conversion/area-unit-converter/)

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Last updated: 2026-08-23 · Version: 1.0.0 · [HTML version](https://codeasystem.com/calculators/construction/tile-calculator/)