4k to 5k in one, and an average of 7k or 8k on another that I'm not sure if I'm continuing or not. I will not read anything that has chapters shorter than 2k because to me, anything that short is not a real chapter. There is no way you can have a proper chapter set up with description, action, etc. and have it less than 2k. To me, 2k is too small for this either but it's the bare minimum I accept.
I can see the occasional chapter being less than 2k but if the story is majority chapters this length, I don't read it. I always ask this question beforehand if someone asks me to read something.
On average, I can write 3k words in about 6 hours if I really get into it. But normally, I do about 1.5-2k words a day and then I stop writing regardless of time spent.