It is very difficult to predict how long mediation will take or, for that matter, how much the overall process will cost. A lot depends on how discussions proceed, and on the complexity of the matter. As you might expect, every situation is unique and special. For divorce and family matters, for example, I have found it takes from two to six sessions, at two hours a session, to adequately cover all the issues raised, and reach agreements that are acceptable to each party.