When selecting a vintage wallpaper pattern for your room, it’s important to know the correct amount of paper that you need. This is especially true with authentic vintage wallpaper because the patterns are no longer being produced and are therefore in limited quantities. If your space requires a lot of wallpaper, you need to make sure to find a pattern that has large quantities in stock.
Measuring your room:
To calculate the amount of paper you need, first measure the height of your wall from baseboard to ceiling. Then measure the length of each wall from corner to corner. Multiply the length (in feet) by the height to arrive at the square footage of the wall. ( L x H = Sq. Ft.)
Subtract the area of large openings such as archways and doors but go ahead leave the area of windows and smaller obstructions in your calculations. The wallpaper that would cover up these areas will be helpful when going around the doorways and in other odd places.
Repeat this process for each wall and add up your results to arrive at the total square footage of your space.
Divide your total square feet by 55 square feet and you will have the number of double rolls that you need.
Tip: An extra roll is always good. It’s better to have a little too much than not enough. Any extra wallpaper will come in handy for human errors in the process of hanging or for repairs down the road. A good rule of thumb is purchasing 1 extra roll for every 6. If the pattern is a very large design or an extra long repeat, you might consider 1 extra roll for every 4.