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How to Measure Your Room for Carpet Installation: A Step-by-Step Guide

A person standing and using a tape measure to measure the length of an empty room with bare floors and white walls, preparing for carpeting. The room is well-lit with natural light from a large window. The person is wearing casual clothing, including jeans and a t-shirt, and appears focused on taking accurate measurements."
"Person Measuring a Room for Carpeting"

Accurately measuring your room is crucial for ensuring the right carpet size and a seamless installation. At Carpestry, we want to make this process as easy and straightforward as possible for you. Follow our step-by-step guide to measure your room accurately and avoid any last-minute surprises.

Step 1: Gather Your Tools

Before you start, make sure you have the following tools:

  • A tape measure (preferably 25 feet or longer)

  • A notepad and pen

  • A calculator

  • Graph paper (optional)

  • A helper (optional but useful for large rooms)

Step 2: Clear the Space

To get the most accurate measurements, clear any furniture or obstacles from the room. This will allow you to measure wall to wall without any hindrances.

Step 3: Measure the Length and Width

Start by measuring the longest wall of the room. Place the tape measure at one end of the wall and extend it to the other end. Write down the measurement on your notepad. Repeat the process for the width of the room, measuring the widest part from wall to wall.

Step 4: Measure Odd Spaces

If your room has any irregular shapes, such as alcoves, bay windows, or door recesses, make sure to measure these areas separately. Note the length and width of each odd space and add these measurements to your main room dimensions later.

Step 5: Calculate the Total Area

Once you have the measurements for the length and width of the room, multiply these numbers to get the total square footage. Use the formula:

Total Area= Length×Width

For example, if your room is 15 feet long and 12 feet wide, the total area would be:

15 feet×12 feet=180 square feet

Step 6: Add Extra for Waste and Seams

It's essential to account for waste and seams when ordering your carpet. We recommend adding an extra 10% to your total area measurement. This allows for any cutting mistakes, pattern matching, and adjustments during installation. Use the formula:

Total Area with Waste=Total Area×1.10

Using our previous example:

180 square feet×1.10=198 square feet

Step 7: Create a Diagram

Drawing a diagram of your room on graph paper can help visualize the space and ensure you haven't missed any areas. Label the length and width of each wall and include measurements for any odd spaces. This step is particularly helpful if you're planning to hire a professional installer.

Step 8: Double-Check Your Measurements

Before finalizing your order, double-check all your measurements. Verify that you've included all areas of the room and that your calculations are correct. It's always better to measure twice and cut once!

Step 9: Consult with a Professional

If you're unsure about any part of the measuring process or have a uniquely shaped room, consult with a professional. They can provide expert advice and ensure that your carpet installation goes smoothly.


Accurately measuring your room is a crucial first step in the carpet installation process. By following these steps, you can ensure that you order the right amount of carpet and avoid any costly mistakes. At Carpestry, we're here to help you every step of the way. If you have any questions or need assistance, don't hesitate to reach out to our team of experts. Happy measuring!

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