It depends on several factors- most notably, the current state of the housing market in your area and how much your home is worth. In a seller's market, homes tend to sell relatively quickly (usually within a few months).
If you're in a buyer's market, it could take up to a year or more to find a buyer.
The best way to get an accurate estimate is to consult with a real estate agent and Arthur T is here for you. He will be able to give you an idea of how long it will take to sell your home.