Board Thread:Theories and Speculation/@comment-25093611-20160304230401/@comment-9782468-20160310172742

It is an enormous amount though. Let's look at Kakashi. His reserves aren't much, he's got pretty average reserves. Kurama, with all his insane amounts of chakra, is only 100 times Kakashi.

1000 times anything is still a lot.

Also I could just make the case that since no one did it (even those with high amounts of chakra), that it's either impossible, or not worth the effort. So the amount of chakra it takes is probably insane. There's a reason it's such an impressive ability to fly