Guide On How To Use A Tile Calculator To Measure A Room

How to Measure a Room for Tiles

Tiling a room might seem straightforward until you’re halfway through and realise you’ve come up a few tiles short and now have an unwanted feature wall. 

Or worse still, you’ve blown your budget buying way too much, and now you’ve got so many leftovers you’re even considering tiling the dog house too.

But that’s where Cheapestiles’ trusty tile calculator comes in.

No ‘grout’ about it, whether you’re redoing a bathroom tiles, refreshing a splashback or laying down some groundwork outdoors, measuring your space correctly is the key to tiling success.

In this guide, Cheapestiles tiling experts will walk you through how to measure a room for tiles manually, and help you square away your next project with confidence. If you are looking for tile calculator australia, this is the best bet!

And if all that sounds like a bit too much effort, we’ve even added our industry-trusted tile calculator below to guarantee you get the right number of tiles for the job.

Why Measuring Matters (and why a tile calculator helps)

When it comes to tiling, getting your measurements right isn’t just a good idea — it’s the whole foundation.

Skip this step, and you could find yourself cutting corners or with enough tiles leftover to do the ceiling too.

If you’re planning a reno in Australia, a good tile calculator is your best mate. 

It takes the guesswork out of planning and gives you a clear idea of how many square metres (sqm) of tiles you’ll need without having to retake your high-school maths class.

Getting it right means:

• No under-ordering disasters
  
• No mountain of excess tiles gathering dust
  
• Saving cash and a bigger budget for the rest of the reno
  
• Fewer delays and smoother installs
  

We always recommend adding 10% extra to your final total to allow for cuts, chips, or dodgy DIY moments. Think of it as a insurance policy… but for tiles.

Use our Cheapestiles tile calculator below to ensure you get the right number of tiles the first time.

Step-by-Step: How to Measure for Tiles Manually

Even if you’re working with a tiler, having these numbers ready can help streamline the quoting and ordering process.

Plus, it gives you confidence when you’re browsing tile ranges, especially if you’re comparing options for different parts of the home.

1. Measuring floors (bathroom, laundry, patio)

For floor tiles, simply measure the length and width of the room in metres. Then multiply.

Example:
Bathroom = 2.5m long × 2m wide = 5 sqm

Now add your 10% buffer:
5 sqm + 10% = 5.5 sqm

If the room is an odd shape (like an L), break it into rectangles, measure each section, and then add the totals together.

Cheapestiles tip: Outdoor areas, such as patios or balconies, may require slight angles or slopes for effective drainage. Factor that in, or you’ll be tiling in your new outdoor pool in no time.

2. Measuring walls (splashbacks, shower recesses etc.)

For vertical tiling, grab the height and width of each section.

Example:
Splashback = 3m wide × 0.6m high = 1.8 sqm

Doing two shower walls? Measure each wall, multiply height × width, then add them together.

If your wall includes a window or vanity mirror, subtract the area of those features:
Total wall = 5 sqm
Window = 1 sqm
Total to tile = 4 sqm + 10% = 4.4 sqm

3. Measuring multiple surfaces (full bathroom reno)

If you’re tiling the walls and the floor, treat them as separate areas and measure them individually.

Let’s say you’ve got:
Floor = 6 sqm
Shower walls = 4.5 sqm
Vanity splashback = 1.2 sqm

Add it up:
6 + 4.5 + 1.2 = 11.7 sqm
Add 10% = 12.87 sqm total

Common mistakes to avoid

Even with a tile area calculator, a dodgy measurement can still trip you up. Measure twice, tile once. That’s how the pros and DIY gurus do it to avoid cracking under pressure.

When you’re working out how many tiles you need, it’s easy to fall into the trap of counting tiles instead of square metres.

But tile sizes can vary considerably, and mixing different styles (like mosaic tiles or large formats) will change how much coverage you get. It’s always better to measure your area in square metres first, then let your tile supplier do the tile-count conversion.

At Cheapestiles, we’ll do the tile count for you based on whatever style you choose. Just give us the sqm, and we’ll handle the rest. It’s one less thing to grout about.

Cheapestiles top five tile calculation mistakes to avoid:

• Skipping the 10% buffer — one chipped tile and you’re back to the store
  
• Measuring in cm instead of metres — always convert
  
• Forgetting to subtract windows and door space
  
• Counting tiles instead of measuring
  
• Mixing wall and floor totals — treat each surface as a separate “tile zone”
  

Using the Cheapestiles Tile Calculator

Once your measurements are locked in, head to our tile calculator to crunch the numbers.

It’s quick, simple, and saves you from the stress of potentially getting it wrong.

Just plug in your measurements (in metres) and the calculator will spit out how many square metres of tiles you’ll need, with a 10% buffer option to ensure you have enough to get your tiling finished first time.

If you’re unsure what to do next, feel free to call or email us.

Our team is happy to double-check the numbers with you, especially if you’re working with trickier areas like angled walls or custom-cut spaces.

TL;DR: How to Measure a Room for Tiles

Measuring correctly is key to avoiding tile shortages, costly overruns, and project delays. Start by measuring each wall or floor section in metres, multiply length × width, then add 10% for cuts and waste. Treat walls, floors, and splashbacks as separate areas, and always subtract windows or doors. For tricky spaces, break them into rectangles. To save time, use the Cheapestiles Tile Calculator — it converts your measurements into the exact tile quantity you need, so you can tile with confidence across bathrooms, kitchens, and outdoor areas.

Choose Your Tiles

Now that you’ve got your tile area sorted, it’s time to pick a look that suits your space.

From bathroom tiles with a waterproof wipeable surface, to kitchen splashback tiles that add a pop of colour, or even outdoor tiles that can weather anything and still look sharp — Cheapestiles we’ve got the style, finish and price to fit the brief and your budget.

So whether you’re still in the planning stages, want to double check your measurements, or  need help with some styling advice, our team’s just a phone call away.

Call 02 9790 4273 or email info@cheapestiles.com.au — and let’s get your tiling plan squared away.