So, you want to install a new backsplash, but you have no idea how much tile you will need, right?

We will show you how easy it is to calculate the area of your backsplash.

Here are the things you will need:

tools for calculating the area of a backsplash


• A measuring tape

• A pen

• Paper or a notepad

• A calculator


First thing you need is to measure your backsplash. Start with the height. With the tape, measure the space (in inches) between the countertop and the bottom of the cabinets. Write the value down.

 measuring the height of your backsplash

calculating the area of your backsplash - step 1 

Now measure the length of your backsplash. Stretch the tape throughout the entire length of your backsplash. Note down the value (in inches).

calculating the length of your backsplash - step 2

writing down your measurements - backsplash area calculation 


It's time to do some Math. Multiply the height and the length of your backsplash, and then divide the result by 144. (You can use the calculator.)

formula to calculate the area of a backsplash


Here it is. This is the total square footage area of your backsplash. In our example the area is 8.833 square feet (sq/ft or ft2). You can round it off to 9 sq/ft.


In Case of Windows

If you have a window or any other obstacle intersecting your backsplash area, you will need to subtract this area from the total square footage area that you want to tile.

backsplash area calculation - accounting for windows


In our example, we measure the length and the width of the window that is intersecting our backsplash, multiply the width by the length, and divide the result by 144. Now you just need to subtract the result from the total area of your backsplash.

In this case:

10 × 36 = 360 ÷ 144 = 2.5 sq/ft.

So, the final area of this backsplash, without the window area, will be 6.5 sq/ft: 

9 sq/ft - 2.5 sq/ft = 6.5 sq/ft

Remember to always order 10% more tile than you think you will need just to be on the safe side.