I'm assuming the anime will catch up to the Manga chapter 652 or so by 2015.

[Legendary Saiyan]

It's 2-3 chapters per episode right?

 

[The Work]

I'd say in about 2-3 months. The way it's going.

 

[ThePooka]

It might be.

 

[Edward Snowden]

It varies. One episode could cover only one chapter while other episodes could cover up to four chapters.

 

[Almighty Push]

It'll be weird once the Manga Ends and the Anime is still going.
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[Cfighter]

It was confirmed a long while ago that the remainder of 2014 will be all canon episodes. Assuming this statement continues to be correct, then the anime will catch up to the most current chapter in approximately 25 episodes (again, that number is an approximation and was calculated under the impression that one episode will cover 2-3 chapters). While there may be no filler however, that does not rule out the possibility of them extending fight scenes, for example.

Now, if the calculated 25 episode plan is followed, uninterrupted by breaks or filler, then the anime will be caught up to the most current chapter [685] on the first thursday in January. Now, given the EXTREMELY unlikely scenario of there being no interruptions for the remainder of the year, its a better calculation to say that the anime will reach chapter 685 in the beginning of February.

Using my calculations [again, repeating that Im assuming that the episodes will be uninterrupted by breaks or by filler and that one episode will contain 2-3 chapters], the anime will reach chapter 652 in approximately 11-13 episodes. Meaning the anime will get to that moment sometime in October.