Approx. how much fabric do I need to upholster a 7 foot sofa. The fabric is 10 feet wide.

I never heard of 10ft. wide fabric. As I remember, it is usually 42", 45" or 60" wide.

How much you need for your sofa depends on the areas to be covered. Does it have pillows, does it have a skirt, is the under cushion area covered in same fabric? You would have to sketch each area out on paper & include the measurements & then map all the pieces out to see how much yardage you would need for each needed piece.

try this website for estimates

http://reviews.ebay.com/Estimating-F...00000000733836

Thanks for all your help. The fabric is really 10 feet wide the fabric is at the Galt Flea mkt in Galt, California. I forgot to mention that it is $10.00 per yard. An amazing find:)

10 feet wide is only 120 inches. I buy quilt backing that wide when I can find it.