Board Thread:Theories and Speculation/@comment-31119074-20170122152801/@comment-25122992-20170210212641

It's not a bs. When Minato/Naruto merged their chakra together, along with chakra of Yin-Yang Kurama halves, Hashi commented that the amount of chakra used is comparable to his own chakra reserves. It was chapter 644, if you want to know.