How to Calculate Carpet Measurements


Measuring for carpet will require you to use some basic math skills. You will need to measure the length and width of various rooms and then total them up to calculate the final quantity needed. Carpet typically comes in widths of 12 and 15 feet. Talk to various carpet vendors to determine which type they sell and how your measurements will work for each size. While you can measure for carpet on your own, the vendor may desire his own measurements to double check your figures.

Things You'll Need

  • Sketch pad and pencil
  • Tape measure
  • Draw a sketch for the rooms needing carpet. Divide each room into measurable squares or rectangles if it is not rectangular; for example, if you have an L-shaped room, divide it into two rectangles for measuring purposes.

  • Measure the length and width of each room. If you have divided large rooms into multiple squares or rectangles, measure the length and width of each section. Multiply the length and width of each measured area to calculate the total area.

  • Divide the area of each room by 9. This will convert the area into square yards, which is how vendors sell carpet.

  • Add the square yard totals together for each room; include an additional 10 percent for waste. This figure is the total carpet needed for your home project.

Tips & Warnings

  • Keep in mind that carpeting is sold in 12- or 15-foot widths. If your room is larger than 15 feet in one direction, you may need to piece the carpeting; if it is less than 12, you'll have some overage, which can be used in closets or other areas. If you're not sure that you've figured correctly, consult a professional.

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