2: Measure length and width.
3: Congratulations - your estimate is complete.
For example: If your room measures 10' x 14', the total square feet are 140. However, since most carpet is sold in 12-foot widths, the minimum amount of carpet needed would be 168' (12' x 14'). The two feet cut off the width of the carpet is not necessarily wasted: the excess can be used in closets or for floor mats, or saved for future repairs. (It is possible that the square footage of your room will equal the carpet required - a 9' x 12 room may be perfectly covered with a single 9' x 12' cut of carpet for a total of 108' square feet.) In other cases, a room's configuration, permanent fixtures, or even furniture layout may create special seaming requirements that affect the amount of carpet used.
Again, your sketch showing the individual measurements will allow the retailer to estimate the amount you need and give you a good idea of what you will be spending.
© 2010 FloorBiz, Inc. All Rights Reserved