# Tile Calculator: How Many Tiles and Boxes Do I Need?

How many tiles and boxes you need for a floor or wall in m² or sq ft, with common tile sizes (300×300 to 600×1200 mm), wastage and an optional cost.

Interactive tool: https://lookup.sg/tools/tile-calculator

## How this works
Area = length × width (minus doors and windows for a wall), or the area you enter in m² or sq ft (1 m² = 10.764 sq ft). Wastage for cuts and breakage is added: an assumed 10% for a straight lay and 15% for diagonal or herringbone patterns.

Tiles needed = area with wastage ÷ the area of one tile, rounded up. Boxes = tiles ÷ tiles per box, rounded up. Tiles per box defaults to a typical count for each size (for example 4 tiles of 600 × 600 mm, 1.44 m² a box), which you should check against your supplier.

The optional cost multiplies the area of the whole boxes you buy (in sq ft) by the price per sq ft, as tile shops in Singapore usually quote. Laying, adhesive, grout and hacking are not included.

## FAQs
### How many 600 × 600 mm tiles do I need for 12 m²?
37 tiles with 10% wastage: 12 m² + 10% = 13.2 m², divided by 0.36 m² per tile = 36.7, rounded up. At 4 tiles a box that is 10 boxes.

### How many tiles are in 1 square metre?
About 11.1 tiles of 300 × 300 mm, 5.6 tiles of 300 × 600 mm, 2.8 tiles of 600 × 600 mm and 1.4 tiles of 600 × 1200 mm, before wastage.

### How much extra tile should I buy for wastage?
About 10% extra for a straight lay and 15% for diagonal or herringbone patterns, more for large tiles in small or irregular rooms. Keep a few spare tiles from the same batch for future repairs.

### How many tiles do I need for 100 sq ft?
29 tiles of 600 × 600 mm with 10% wastage (100 sq ft is 9.29 m²), which is 8 boxes of 4.

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Source: Lookup (https://lookup.sg) · Data as of October 2026 · Listings compiled from Singapore government open data (data.gov.sg), OneMap and Overture Maps places. Free listings never show contact details; contact details appear only on Lookup Verified listings.