Board Thread:Versus Debates/@comment-30168027-20161030085406/@comment-734582-20161211113052

Kakashisologod wrote: Yeah cost a lot of chakra for kaguya,and now it didnt took 10% of his chakra right? Keep in mind that Kaguya summoned dimensions and opened dimensional portals constantly. She didn't do it once and then ran out. Obito opened 3 portals with his own and Sakura's chakra, and since it's not his own space-time it would cost extra. But considering what we saw of sakura's level, i don't think it was biju level of reserves.

So yes, interdimensional portals cost a lot of chakra. I think many a Kage would die from exhaustion and still fail. But it's not so much that it requires biju-levels of chakra, whereas we've seen Sasuke use techniques that seem to be Biju-level.

Drawing a conclusion, it cost Sasuke quite a bit of chakra but i'd dare say less than half his reserves. Compare that to Naruto, and i think Naruto lost (both percentage-wise and in absolute numbers) more chakra, both by taking the brunt of the attack in the arena and being subjected to a chakra drain for at least a few hours.