im just wanting to get enough dynomat to cover where my new carpet will lay so i can get my seats and such back in there. Ill do the fenders, and trunk area on later. So how much sqfeetshould be enough to bycover my floors under the carpet plus maybe a little extra for some overlapping in areas?

 

I used 80 ft in my coupe. I triple layered some areas (trans tunnel & toeboard) & still had about 10 ft left over.