How Much Wallpaper Do I Need? (with calculator!) - Decor for Sight, Decor for Wellbeing, Home Decor Ideas, Home Decor Styles, Wall Decor, Wallpaper - Forest Homes

How much wallpaper do I need? (with calculator!)

 Have you felt overwhelmed at the idea of using mural wallpaper because you simply didn't know how much to use? It doesn't need to be like that! In just a few seconds you can figure out exactly how much wallpaper you need to create, remodel or just revamp that beautiful space of yours. Find in this article all you need to know for answering the question "How much wallpaper do I need?" with a helpful calculator, and all about measuring your walls to get creating your future amazing walls with wallpaper.

One of the things that first come to mind when deciding to buy wallpaper is figuring out how much wallpaper to use. To make this happen, the very first thing you need to do is measure the surface area of yours walls. This could be a simple process if you have one continuous wall, or a slightly more difficult one if you're dealing with irregular walls like slanted or curved walls, staircases, or others. Read below for a simple and efficient method to calculate your wallpaper.

What is mural wallpaper?

Mural wallpapers, especially those inspired in nature, are a great way to expose yourself to stunning imagery and create unique interior spaces. Instead of being a repeated pattern, mural wallpaper is a large, scalable image. Mural wallpaper is generally sold by the square meter, and the package could come in one or several rolls.  

Pastel Wallpaper - How much wallpaper do I need? (with calculator!)

Photo: Miami Moon Mural, here at Forest Homes

How to measure my walls for wallpaper?

To find our how much wallpaper you need, the very first thing you need to do is measure the height and width of yours walls.

Measuring the height and width of a wall for hanging murals can vary depending on the type of wall and the complexity of the installation. Here are some general guidelines for measuring different types of walls.

Straight Walls

Measure the height of the wall from the floor to the ceiling or desired mural placement point. Then, measure the width of the wall from one corner to the other. If there are any doors or windows, do not subtract their measurements as the mural wallpaper should be continuous around these obstacles.

Sloped or Slanted Walls (e.g., Attic Walls)

Measure the height and width at the tallest and widest points.

Curved Walls

For curved walls, use a flexible measuring tape or a string to follow the curve accurately and capture the width and height.


When measuring a wall along a staircase, it's best to measure both the vertical and horizontal aspects. Measure the height of the wall along the staircase's slope. Measure the width at widest points.  In regards to railings or other obstacles, do not subtract their measurements as the mural wallpaper should also be continuous around these spaces.

Irregular Shaped Walls

For walls with irregular shapes, always measure key points such as the highest, and widest points.

Multiple Walls and Corners

When working with multiple walls or corners, measure each wall individually and note the dimensions for each section. Take measurements from corner to corner, and be sure to account for any irregularities.

Ceiling Height Variation

If your mural extends to areas with different ceiling heights, measure each section separately. Account for wallpaper considering the height of the highest point.

Add Extra for Overlap and Trim

Always add a little extra to your measurements to account for trimming and overlapping wallpaper during installation.

Double-Check and Confirm

It's crucial to double-check your measurements to ensure accuracy, especially for large murals.

Remember to use a reliable measuring tape or laser measure for accurate measurements. It's also a good practice to consult the manufacturer's installation instructions for any specific guidelines regarding measurements and installation techniques for your particular mural or wallpaper. If you're unsure, consider seeking professional help to ensure a precise and successful installation.

How much wallpaper do I need?

Now with your wall measures, what you need to do is calculate the wall surface area. If you have several walls you can add up the surface areas of each of the walls together. The total area will be equal to the order units. Let's say for example,  your wall measures 3 m (9.8 ft) width and 2.4 m (7.9 ft) height. Include a few 5 cm (2 in) for errors in measuring. To get the area, multiply 3.05 m (10 ft) width times 2.45 m (8ft) height and that is equal to 7.47 sq. m. (80 sq. ft) Round up and you need 8 sq. m or 8 units of Mural Wallpaper (80 sq. ft).


Jungle Wallpaper at Forest Homes - How much wallpaper do I need? (with calculator!)


Photo: Wilderness Mural Wallpaper at Forest Homes 

Mural Wallpaper Calculator

Estimate your mural wallpaper quantity according to your wall size and add these units to your cart.

Wallpaper Calculator

Enter your wall dimensions
Use meters and . for decimals

Your result will be displayed here


Need help ordering? Contact us now on our chat for an immediate response (bottom right of the page), write a question on this page "Have a question" section, or send us email at 


Nature Mural Wallpaper at Forest Homes - How much wallpaper do I need? (with calculator!)


Photo: Plantation Mural Wallpaper at Forest Homes

Final Tip: How much wallpaper do I need?

You always want to order a little too much instead of not enough. The last thing you want is to run out of wallpaper and have to reorder since it is difficult at times to get the same lot and range of colours. To keep things simple and to ensure you have enough paper do not make any deductions for windows, doors, cabinets, etc. If you are confused about the installation, get the assistance of a local professional wallpaper hanger, however this is no impossible work for you to do it on your own by following a process.

See all of our nature inspired wallpapers here and get started with a gorgeous natural room!


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