How deep is a Fathom? By Pamela Landy A fathom is Six feet deep. How far is a league? A League can vary from 2.4 to 4.6 miles. What is the area of an acre? An acre is 4,840 square yards, or 43,560 square feet. Related PostsHow deep is an ocean abyss?How wide is a golf hole and how deep is it?