User blog comment:KillRoy231/Villains/@comment-5268982-20140706163634/@comment-7418318-20140706185537

Since the Manga is still ongoing and Hiro Mashima hasn't said anything about when it'll end, we can't answer that yet.

But we can tell you that the anime currently has 189 episodes (24 are considered one season, if I'm not mistaken). That brings them to where the manga was in chapter 322 and right now the manga is at chapter 391. If we go by the usual 2 chapters per episode rule of thumb, that'll give up to episode 223 or so plus however many there will be.