As for now 53 volumes, but don't worry that's not end...but we are headed towards it. I've already seen the episodes of Inuyasha: The Final Act so...I'm simply awaiting the end of the manga.
the DNangel series is right now i believe is 13 mangas long and has NOT been completed, but number 14 as i know has not yet been published in japan though a argentine special chapter was just released