How many chapters do you read in one day?

Depends on how interesting the novel is and how hooked I am. I can easily read novels of up to 1000 pages in a day if it's a really good book. 

For me it depends on how many chapters are available  

Depends on how it's written and on the reading time. Anywhere between 20-200 chapters.

My benchmark for speed is Harry Potter first book. I read that in 5 hours. 

If it’s good then 50, I guess. It can go higher but on a average it’s 50. 

As many as I have time for, usually. I don't tend to read novels I don't like and I binge those that I do until caught up. 

probably 40 chapters, but if i like it so much i'll just non-stop read until i have to eat/sleep lmao