In a regular week, when I haven't picked anything new, I read about 21-50 Chapter. In some weeks this amount increases to 51-100. Though, this seldom happens.

Now, in case of me having picked one or few new series then the number of chapter would be around 201-500. This number might increase a bit more, like another hundred or so. It depends on the series. Like if I'm reading something like ReLIFE, then reading 100+ chapters/day wouldn't be Big Deal, plus I would be very delighted to do so. As long as the series is refreshing. ^^

P.S. None of my counting above includes LN, Novel chapters. Only Manga/Manhwa/Manhua (Webtoons) as the poll suggests.

1-10 but now I realize I probably should have put 11-20 to be "safe?"

Not many series that I follow now; or more like series i follow don't constantly update

On occasions, it's not that difficult to stay up late and binge through a long series though but to do that regularly....

Also some series have longer chapters e.g. Bokura no Kiseki chapters average 50 to 60+ pages

Not much. Around 10 I guess.

Around 10 normally, of course a lot more if I pick up something new.

I have no real manga backlog and will only count my ongoing translations / scanlations. 101-200 won´t apply to every week but it should be the most fitting with 51-100 also looking highly realistic for every other week. Otakumole, occasional US rips / German translations, that crazy hentai watch i started in our 18+ boards and whole volume releases should tip me overt the edge though. And then there are Tomo-chan wa Onnanoko! and the like.
I may occasional land on 201-500 if i am allowed to count my other comic books as i do have a (US only) backlog there. Finishing up the original 90s Valiant runs is my current task.

I am only reading one manga at the time so one chapter per week.

I definitely read more than 21 per week. If I pick up something it may be even over 100 in just the weekend alone. And if i'm on vacation I might read 100 chapters per day... for example I have read 600 chapters of One Piece in just a single week of vacation. But that happens not more than once a year, and only if I have internet when I'm on vacation... so I suppose 21-50 is the closest guess for me because I rarely pick up new mangas lately except for one shots or short ones.

Normally 1-10 per week since I don't read manga that much anymore and I never really read many weekly manga anyway. Every now and then I binge something new which would definitely put me at about 101-200 for two or so weeks, so I guess if it's averaged out for a year, it'd be 11-20 per week.

Around 1-10 for me, depends on how many chapters are updated.
I usually don't have much time to read so I wait for updates on the ones I currently read while only starting a new manga occasionally. If I really have a day to spend I'll binge read a whole series, but that's pretty rare right now.

It varies between options 1, 2 and 3 depending on the kind of week I've been having. Never more than that, though, not even during the holidays. I have to read books and watch anime too, after all...

Just depends on the week. Usually option 2 or 3 during school season. And probably around 51-100 in the summer.

Actually not too sure about this.

I read manga during my lunch breaks at work. I'll say 20+ chapters easily a day. And that's only what I'm reading during my lunch breaks. I'll also read them during regular breaks and when I'm home. So I easily do 100 a week from lunch breaks alone. I guess I'm probably in the 101-200 range if not higher.

normal weeks, probably around 11-20. If I picked a new series, it can be up to 100+ but definitely lower than 200.