# How To Calculate Square Feet For Wallpaper

## Introduction to Calculating Wallpaper Measurements

Capable of transforming a bland surface into a showcase of design, wallpaper is a popular choice for both residential and commercial interiors. However, purchasing the appropriate amount of wallpaper can feel like solving a mathematical puzzle. To eliminate the guesswork, this article is committed to demystify the process of calculating wallpaper measurements.

### Understanding Wallpaper Measurements

Before calculations can begin, it is crucial to understand the standard unit measurements used for wallpaper. Typically sold in rolls, wallpaper is commonly measured in square feet. A square foot measures the area of a space, helping to determine how much wallpaper is needed to cover a particular surface. The dimensions of a roll of wallpaper can differ, so always check the product specifications.

### Measuring Your Space

To calculate the amount of wallpaper needed, start by measuring the height and length of each wall using a measuring tape. If you are not covering an entire wall, adjust your measurements accordingly. Remember to note the measurements in feet to align with the wallpaper measurements.

### Calculating the Area of Your Walls

Once you have your wall measurements, calculating the square footage is relatively straightforward. Here's how:

### Inclusion of Doors and Windows

Note, your wall will likely have interruptions like doors and windows. For a more accurate estimate, measure these areas and subtract their square footage from your total wall square footage.

### Allowance for Waste

It's always advisable to allow for some waste when calculating wallpaper measurements due to the pattern repeat and mistakes. While an extra roll or two is generally sufficient, a professional wallpaper installer may be able to give a more precise estimate.

#### Pattern Repeat Consideration

In the world of wallpaper, pattern repeat is a vital factor that affects the amount of wallpaper you will need. It refers to the vertical distance between where the pattern is identical again so it might cause wastage while cutting and matching the pattern. When dealing with a wallpaper pattern with a large repeat, you may need to purchase extra rolls.

#### Seeking Professional Help

If the process feels overwhelming, professional assistance is available. A wallpaper installer can help measure your space, consider pattern repeats, and estimate the amount of wallpaper required accurately, ensuring that you purchase the right amount and avoid unnecessary costs.

## Understanding Square Footage Basics

To successfully estimate how much wallpaper you will need, it's necessary to understand the basics of square footage calculations. Wallpaper is often sold in rolls measured in square feet, hence why understanding square footage is essential.

### What is Square Footage?

Square footage is a common measure of area used primarily in the United States, the United Kingdom, and Canada. It is calculated by multiplying the length and width of a space, resulting in the total area in square feet.

### Why is Square Footage Important?

Square footage gives you the total area of a wall, ceiling, or room. This information is crucial for ordering the correct amount of wallpaper, as most wallpaper is sold by the square foot. Knowing this allows you to estimate costs and avoid over or underestimating your wallpaper needs.

#### Determining the Square Footage of a Room

To calculate square footage, use a tape measure to find the length and width of your space in feet. Next, multiply the length by the width - the resulting number will be the area of your wall or room in square feet.

### How to Account for Doors and Windows

You will need to subtract the area of doors and windows from the total square footage of your wall. Simply calculate the square footage of each door or window and subtract it from your total.

### Common Mistakes in Square Footage Calculations

Some common mistakes include failing to measure in feet, not accounting for windows or doors, and neglecting to consider the 'repeat pattern' size if your wallpaper has one. This can significantly affect your measurements and subsequently, the quantity of wallpaper necessary.

### Estimating Excess Wallpaper

When calculating the quantity of wallpaper required, it's always prudent to include a little extra for unexpected challenges - for example, pattern misalignments or mistakes during application. Generally speaking, an extra 10-15% allowance over your calculated square footage is a safe bet.

### Importance of Accurate Measurements

Meticulous measurement is key. An incorrect estimation can result in an insufficient amount of wallpaper, inconveniencing you with the task of reordering and potentially delaying your project.

## Calculating the Wall Area

When it comes to wallpapering, one of the most crucial steps is determining the area of your walls in square feet. This calculation allows you to determine the quantity of wallpaper you'll need for your project.

### Step 1: Measure the wall dimensions

Begin by measuring the width and height of the wall. Use a tape measure and start from one corner to the other to calculate the width. To measure the height, start from the floor and go up to the ceiling. Record your measurements in feet.

### Step 2: Multiply the dimensions

Once you have the width and the height, the next step is simple multiplication. The width multiplied by the height gives you the total wall area. For instance, if your wall is 9 feet high and 12 feet wide, the area would be 108 square feet.

### Step 3: Considering doors and windows

You also need to take into account any doors, windows, or other cutouts when calculating the total wall area. Measure the width and height of each, calculate their area, and subtract it from the total wall area.

### Step 4: Allow for waste

It's also important to allow for waste when calculating your wallpaper needs. A general rule of thumb is to add 15% to your total square footage to account for pattern matching and any errors made during application.

#### Example of waste calculation:

If you have calculated your total wall area (after subtracting doors and windows) to be 1000 square feet, you should add 150 square feet (15% of 1000 square feet) for waste, bringing the total to 1150 square feet.

### Step 5: Checking your calculation

Don’t forget to double-check your calculations before purchasing your wallpaper. It can be frustrating to realize midway through a project that you have underestimated your square footage and do not have enough wallpaper. Verify your measurements, repeat your calculations if necessary, and feel confident about moving forward.

By correctly calculating your wall area, including considering doors, windows, and waste, you’ll be well on your way to completing a successful wallpapering project.

## Factor in the Size of the Wallpaper Roll

When calculating how many rolls of wallpaper you will need, it's crucial you factor in the size of the wallpaper roll. Standard wallpaper roll sizes vary by location. For instance, in the US, one roll typically covers 36 square feet, while in the UK, one roll covers about 21 square feet. Such difference can significantly impact the overall quantity required.

### Understanding Wallpaper Roll Dimensions

The size of a wallpaper roll is expressed in terms of its width and length. In the UK, a standard roll is 0.53 meters wide and 10 meters long. Whereas in the US, a standard roll measures 27 inches wide and 5 yards long. Always ensure to check these dimensions from your supplier or on the packaging to avoid discrepancies.

### Calculating the Number of Rolls

After determining the total square footage of your walls and understanding the size of your wallpaper roll, you can next calculate the number of rolls needed. All you need to do is divide your wall's total square footage by the square footage of one roll.

Number of Rolls = Total Square Footage of Walls / Square Footage of One Roll

Remember to always round up to the nearest whole number, as you can't purchase partial rolls. It's also a good idea to buy an extra roll for backup or to cover mistakes. If the wallpaper pattern needs matching, you may require more rolls.

#### Accounting for Waste and Pattern Repeats

Do not forget to account for waste. It's common to have leftover scrap pieces after cutting the wallpaper to fit around windows, doors, and electric outlets. Subtract these areas from your total square footage. Also, some wallpapers have a pattern that repeats, meaning you will need more than what your square footage suggests to properly align patterns.

### Confirming your Calculations

Lastly, it's always best practice to confirm your calculations with a professional or with the store you are purchasing the wallpaper from. This will help ensure you don't under or overestimate your wallpaper needs.

## Accounting for Pattern Repeat

When working with patterned wallpaper, it is critical to factor in the pattern repeat. The pattern repeat refers to the vertical distance between where the pattern is identical again (repeats). This affects the total amount of wallpaper you'll require.

### What is a pattern repeat?

A pattern repeat on wallpaper is the distance before a design repeats itself. Repeats can range from fewer than an inch - often seen in small-scale patterns - up to several inches for larger, more intricate designs. Design repeats can affect how much wallpaper you need because to avoid abrupt transitions or misaligned designs, wallpaper must occasionally be trimmed to keep the pattern consistent throughout the room.

### Determining Pattern Repeat

You can find out the size of the pattern repeat by checking the wallpaper label. If the repeat is straight, it means the pattern matches at the same point at each strip. If the repeat is offset, it means the pattern matches at the mid-point of the next strip.

#### Calculating Wallpaper Needs with Pattern Repeat

To calculate the amount of wallpaper you need when considering pattern repeat, first, measure the height of your walls and the repeat of the pattern. Then, find out how many repeats you get from a roll of wallpaper, which is typically around 33 feet long. Divide the length of the roll by the pattern repeat to determine how many repeats you get per roll.

#### Adjusting for the Pattern repeat

If the height of your wall is less than the amount of pattern repeats on one roll, then you don't need to worry about adjusting for the pattern. However, if the height of your wall is more than the pattern repeat, you'll need an additional roll for each wall to match the pattern appropriately.

#### Bottom line

While calculating the square footage for wallpaper is a straightforward task, adding in the nature of pattern repeats can make it more complex. But, with the above explanation, you should have no problems making accurate calculations.

## Calculating how Many Rolls of Wallpaper You'll Need

Once you've gathered all the necessary measurements and have a clear idea of the size of the space you want to cover with wallpaper, the following step is to work out the number of rolls you'll need.

### Determining Wallpaper Roll Coverage

Before diving into calculations, remember that the coverage of a roll of wallpaper varies depending on its dimensions. Traditional wallpaper rolls from Europe typically measure approximately 21 inches wide by 33 feet long, which covers about 57 square feet. On the other hand, American standard rolls are generally 27 inches wide by 27 feet long that cover about 60.75 square feet. Always confirm roll coverage from the seller or the manufacturer's information on their website.

### Calculating Number of Wallpaper Rolls

Divide the total square footage of your walls (calculated earlier) by the total coverage from one roll of your chosen wallpaper. Round up to the next largest whole number. This number is your estimated number of rolls you need to purchase.

```
Number of Rolls = Total Square Feet / Coverage per Roll
```

#### Note on Wallpaper Pattern Repeats

Certain wallpaper designs have pattern repeats. A wallpaper pattern’s repeat is the vertical distance between where the pattern is identical again (repeats). This needs to be considered as it affects the amount of wallpaper you will need. Stated plainly, the larger the repeat, the more wallpaper you will need to match the pattern. Therefore, for wallpapers with large pattern repeats, it's suggested to buy an extra roll.

#### Allowance for Errors and Extras

It's always safer to err on the generous side when calculating wallpaper needs. If your calculations result in needing partial rolls, always round up to the next whole amount. Additionally, keep in mind that it's not uncommon to need a touch-up from time to time or to miscalculate somewhere along the way. Therefore, it is a good idea to purchase one or two extra rolls beyond your calculated need. This ensures that you have the same dye lot in case you need to replace a panel or decide to paper an additional area.

#### Calculating for Doors and Windows

Door and window spaces can be deducted from your total calculations. One common approach for this is to calculate their area individually (height x width) and then subtract it from the total wall area. Next, calculate the resulting square footage as you normally would.

### Benefits of Accurate Calculations

Doing the math beforehand not only helps to prevent the frustration of running out of rolls in the middle of the project, but it also saves you from wasting money on unnecessary extra. Carefully planned, precise calculations make for efficient purchases and a smoother wallpaper installation process.

### Sample Calculation

For example, if you have wall space that totals 340 square feet, using European rolls that each covers about 57 square feet:

```
Number of Rolls = 340sqft / 57sqft = 5.96
```

Rounding up, your requirement will be 6 rolls of wallpaper. This does not include an extra allowance for pattern matching or errors.

Remember, each project is different, and our guidance is an educated estimate - unforeseen complications might require additional rolls.

## Tips for Maximizing Wallpaper Use

When it comes to wallpaper installation, getting the most out of your wallpaper is crucial, especially if dealing with limited quantities or budget constraints. Here are some tips that can come in handy:

### 1. Accurate Measurements

The first step is making sure you have accurate measurements of the walls you plan on covering. Measure the height and width of each wall in feet and multiply these figures to obtain the wall's square footage. Allow for a little more for contingencies.

### 2. Pattern Matching

If your wallpaper has a pattern, ensure you account for the pattern repeat. This may cause you to need more wallpaper than a simple height times width calculation would indicate. Aligning patterns can result in a bit of waste with each new strip, so factor this into your calculations.

### 3. Efficient Cutting

Efficient use and cutting of wallpaper can save a significant amount of material. Always attempt to use the largest cut-off pieces to fill smaller areas if possible.

### 4. Consider Door and Window Areas

When calculating your square footage, don't forget to subtract the area for doors and windows. However, you may still want to account for some surplus wallpaper to accommodate for any cutting errors.

### 5. Stock Up on Extra Wallpaper

Lastly, it’s always a good idea to buy some extra wallpaper. This will account for any errors made during the installation process, and will provide you with an exact match if you ever need to make repairs in the future.

### 6. Quality Over Quantity

While it’s tempting to save money by buying less expensive wallpaper, investing in high-quality wallpaper can often save you money in the long run. Better-quality paper will likely last longer and stand up to wear and tear better, which means you'll be less likely to have to replace it.

Following these tips can ensure you use your wallpaper to its full potential, get the most value for your money, and result in a beautiful and long-lasting finish.

## Key Takeaways for Successful Wallpaper Measurements

Taking proper measurements has a pivotal role in wallpaper installation. Below are some key takeaways that will help you make successful wallpaper measurements.

### Understanding the Unit

First, it's essential to understand the unit of measurement that we are working with. In this context, we're measuring area, which is often represented in square feet. Remember that 1 square foot is a square-shaped space that measures 1 foot on all sides. It’s important to convert all measurements to this unit for consistency.

### Measuring the Space

Measure the width and height of each wall in feet. If the walls are not a perfect rectangle, divide them into smaller rectangles, squares or triangles and measure each separately. To find the area of rectangles and squares, multiply the length by the width. For triangles, multiply the base by the height and then divide by two.

### Calculating the Total Area

Next, add up the areas of all the segments to find the total area of your wall. Remember to deduct the area of doors and windows from your total measurement. This calculation will give you an estimate of how much wallpaper you'll need.

### Consider the Wallpaper Pattern

If your wallpaper has a pattern, consider the pattern repeat when calculating your wallpaper needs. You'll need extra wallpaper to ensure the pattern matches across all strips.

### Factor in Overlap and Trimming

Wallpaper panels are typically designed to overlap slightly, ensure that your quantity accounts for this. Additionally, it's recommended to buy extra to allow for possible mistakes and trimming excess.

### Always Buy Extra

It's always a good idea to buy a little extra wallpaper than you think you'll need. Mistakes can happen, and you might need replacements in the future. Having a bit extra will save you from the trouble of finding the same print later, particularly if it gets discontinued.

### Make Use of Online Tools

Finally, consider using online tools and calculators that can help you estimate the amount of wallpaper you will need. These tools often take into account factors like doors, windows, and pattern repeats, making calculations easier.

Remember, careful and accurate measurement is the first step to a successful wallpaper installation project.