Tiles Calculation Formula – How to Calculate the Number of Tiles Required?

Confused about how many tiles you need?

Knowing how to calculate square feet is a vital skill for most home renovation tasks. For flooring square feet will help you determine the right number of supplies for any job. Calculating the correct number of floor tiles or wall tiles for our project might be challenging. A sufficient number of tiles must be on hand before starting any tiling project. The last thing you want to learn halfway through the project is that you didn't order enough tiles.

Calculating the correct number of tiles is the best way to avoid wasting time and money while tiling a room. Just get the appropriate measurements for the tile you need with a few calculations and a little assistance. Don't worry, a math degree isn't necessary!

This tile calculator guide by AGL Tiles will help you easily understand how to calculate the needed tiles!

1. Grab Your Measuring Tools

Whether you're measuring to install ceramic tiles for your living room or vitrified tiles for the kitchen backsplash. Your supply list is going to be very straightforward. You'll need the following items:

  • Measuring Tape
  • A Notepad and a Pencil
  • The Calculator

The procedures for estimating how many tiles you need are the same whether you're tiling your entryway floor or kitchen walls.

Let's get started if you have gathered all this stuff!

2. Time to Take Measurements

Before getting started with the measurements, make sure the entire area is clear & nothing is in the way with your measuring tape. Move all furniture to the middle of the room and banish any pets that may be in your way!

If you are unable to clear the whole area, check if the measuring tape can travel in a straight line without bending or folding over an object.

For Square & Rectangle Rooms

In inches, measure the length and width of the space.

For Round Room
  • Stretch your tape measure across the circle's centre.
  • The tape measure should begin on one wall and travel across the middle of the room until it reaches the opposite side.
  • The diameter is the entire length through the centre of your circle.
  • Your floor tile calculations will require you to know the radius. It is half of the diameter, which is the distance you just measured earlier. From one wall to another.
Must Read:- 7 Stylish Bathroom Tiles Design Ideas That Will Make You Say Wow

3. Calculating Square Feet

To figure out the required number of floor tiles or wall tiles, calculate the entire size of the space you just measured.

That will provide you with the total square footage in inches for each place you intend to tile. You'll have to multiply the length by the width in feet to get the square feet of the room.

Sq. Ft. = L * W.

For Rectangle Room

To calculate your total area in square feet, multiply the length by the width of the room and then divide the result by 144.

Here's an example:

  • Let's assume we have a rectangle room with dimensions: 101-inch x 63-inch
  • First, apply the square feet formula, i.e., length x width: 101 in x 63 in = 6363 inch
  • Finally, divide it by 144 to get your total square feet: 6363/144 = 44.19 sq. Ft.
For Square Room

It's much easier if you have a square room because a square-shaped space has the same length and width.

Here's an example:

  • Let's say we have a square room with dimensions of 120-inch x 120-inch
  • Length x Width: 120 in x 120 in = 14400 inch
  • Now, divide it by 144: 14400/144 = 100 sq. Ft
For Round Room

Measuring round rooms can be a little challenging. To calculate the radius, divide the entire length in inches by two.

Your computations will be simplified if you round up to the nearest whole number. The radius is then multiplied by pi – or 3.14.

To calculate your total in square feet, round it up to the next decimal point once more.

Here's an example:

  • Let's assume you want to tile a circular area with a diameter of 240-inch
  • To calculate the radius, divide the diameter by 2: 240-inch/2 = 120-inch
  • To get your total square feet, multiply the radius by 3.14: 120-inch x 3.14 = 376.8 sq. ft.
  • Let's round it up to 377 sq. Ft.

4. Tile Calculation

Aside from calculating the total square footage, you may also be interested in the approximate number of tiles required to cover an area. It is extremely simple to convert the coverage area to the number of tiles!

To begin, calculate the tile's square footage by multiplying the tile's length and width in inches. Finally, divide the calculated size of the space by the area of one tile. The result is the exact number of tiles required for the area. An example might help you understand it better.

  • Let's assume you have tiles that are 11.8 x 11.8 and you want to tile a small bathroom with an area of 48 lengths x 24 widths.
  • Now, calculate the total area of each tile: 11.8-inch by 11.8-inch = 140-inch (rounded up)
  • Secondly, calculate the total area of the bathroom: 48-inch x 24-inch = 1,152-inch
  • Lastly, divide the area of the bathroom by the area of the tile: 1,152/140 = 9 tiles needed (rounded up)

If you don't want to do all these calculations, you can find a floor tile or wall tiles calculator square foot easily online to do all the tile calculations for you.

The number of tiles will depend upon the size you select. Generally, people go for bigger sizes when it comes to bathroom tiles, even if it is for the walls,

Must Read:- 7 Tips to Select the Best Tiles for Living Room

5. Including Coverage

The final and most important step is to order some additional tiles to ensure full coverage. You also need to account for cuts, wastage, and probable breakage when you trim tiles to fit.

To correctly estimate your overage requirements, examine how you will lay your tiles. For more complicated designs, such as running tile at a 45-degree angle or making a pattern like a herringbone that necessitates additional cuts. We recommend increasing your overage amounts to at least 15%.

You can checkout AGL's 360 Tile Visualizer to truly have a look at the tiles through a visualizer. It will help you to pick out your ideal floor tiles and wall tiles, along with the desired angle, grout line, and overall layout. Tile visualiser also offers kitchen tiles and bathroom tiles to help you complete the look.

The 15% overage is also suitable for floor tiles that will be put in a room with many edges and corners. More waste is to be expected when more floor tiles are cut to fit tightly around corners. Once you've determined your optimum overage %, multiply the square footage of the space by the overage percentage. Then add the difference to your total square feet.

The general rule is that the larger the floor tile and the more intricate the design, the more waste there will be! Having additional floor tiles or wall tiles is usually a smart idea.

Final Thoughts

Tile calculation is an important step if you are planning to install them on your property, be it a home or commercial space. Now that you know how to easily calculate tiles, allow us to help you pick the best ones.

AGL Tiles is home to some of the largest and most diverse floor tiles, wall tiles, outdoor tiles, kitchen tiles and bathroom tiles collections.

The wide range with premium quality is all you need to design an impeccable space!


Simply divide the entire area by the area of a tile to determine the number of tiles required to fill the space. For a 40-square-foot space, we require 40 tiles that are 12" X 12".

Subtract 12 from the total number of tiles required. You should do this because you'll need to know how many boxes of tiles to purchase because 12 by 12 tiles are often offered in boxes of 12. For instance, 15.5 boxes would be needed if the total square footage was 186.

Typically, a box contains 4 pieces of 2x2 square feet, or 600x600 millimetres, 60x60 centimetres, and 24x24 inch tiles. These tiles are available in multi-colour glossy finish with thicknesses ranging from 5 to 10 millimetres, and they cover an area of approximately 16 square feet or 1.48 square meters.

  • Mark the drawing or photograph with the inch measurements for each side.
  • If necessary, divide the room into sections, giving each one a capital letter from A to Z to prevent confusion.
  • Divide each section's height and width by two.
  • For the square footage, add up all the sections and divide the total by 144.
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