1 oz will treat 30 linear feet, each bottle will treat up to 855 Linear feet. A linear foot is 1 square foot in a row. So if you treat just 10 linear feet, that would only take 1/3 of an oz. Not much. If you treat a 10' X 10' area that is 100 square feet. It basically just depends on how you apply it. This is according to the label directions. I always make a slightly heavier application.