How long will it take to read Naruto manga from chapter 1 to whatever is the last?

The manga has 632 chapters as of now.It depends on your speed of reading, if you try you can even read it in one week.However, I don't support that.I advice you to spend ATLEAST 2-3 months in reading the whole manga, because if you hasten it, you won't be able to retain even 10% of it.Haste makes waste, you should take your time to read the manga, stop and understand it, and then reread it again.Only then would you be able to properly digest everything.Otherwise nothing would make any sense~

well the manga is somewhere around chapter 630 something.

So it depends how long it takes you to read a chapter XD

depending on how much time you have. I have no life, so it took me 3 days to read 100 something chapters. there is around 623 i think chapters now.

I'd have to guess around two weeks. I stopped reading for a while, and I had to catch up on around 120 chapters. I marathoned it, and it took me around two and a half days.