How Many Tiles Do I Need?
12/01/2026Whether you’re renovating a bathroom, styling new kitchen backsplash tiles, or tiling an outdoor patio, one of the first questions you’ll ask is: how many tiles do I need? It sounds simple, but getting it right can save you time, money, and avoid project delays.
In this guide, we’ll walk you through exactly how to work out how many tiles I need, explore practical tips, and show you how to use a tile calculator to take the guesswork out of your project.
Why Knowing How Many Tiles You Need Matters
Ordering too few tiles means stopping mid-project and waiting for more to arrive — possibly from a different batch with slight colour or finish variations. Ordering too many is wasteful and eats into your budget.
That’s why understanding how to calculate the amount of tiles needed upfront is essential. With the right measurements and tools, you can be confident in your order quantity.
Measure the Area First
Step one in calculating your tile requirement is knowing the surface area you’re covering.
How to Calculate m² for Tiles
To calculate square metres (m²)
For walls, use the equation of Width x Height = Area
For floors, use the equation of Length x Width = Area
Measure the width, height, and length of the space in metres.
Now that you know the area in square metres, you can figure out how many tiles are needed for that surface.
Top Tips When Calculating Tile Size
Consider Tile Size: Different tiles come in many sizes — such as 300×300mm, 600×600mm, or 300×600mm.
Remember to round up; you can’t order a fraction of a tile!
Don’t Forget Wastage: Tiles can be cut for edges, corners, and irregular spaces. Add at least 10% extra to your total to account for cuts, breakages and future repairs. Sometimes more is wise if your layout is intricate or your tiles are patterned.
Use The CTD Tile Calculator
If you want to eliminate mental maths and get instant results, a ‘how many tiles do I need?’ tile calculator is your best tool. By following three easy steps and entering:
The dimensions of your space (in your choice of unit of measurement)
Window and door measurements
Your desired wastage percentage
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We’ve built a tool that does all the hard work for you. Just plug in your numbers and let it calculate! Please use the Tile Calculator as a guide only. CTD can accept no responsibility based upon these measurements – see our terms and conditions for full details.
Always double-check your measurements and review the tile size before ordering. When in doubt, don’t hesitate to contact our expert teams or visit your closest store!