Adult novels are roughly 80,000 - 90,000 words in length.
Young adult novels are roughly 50,000 - 80,000 words in length. Even 80,000 is kind of pushing it so I would keep it a bit lower than that.
Middle Grade is 20,000 - 55,000 words, depending on the subject matter and age range.
Children's picture books are roughly 500 - 600 words. If you get too close to 1,000 words, publishers and agents will shy away.
Nonfiction books are usually 5,000 words.
But how does this transfer to paper? Well, it will depend on the format of your book document and the font, but if you have the margins arranged as 1 and the line spacing set for 1.5, then 60,000 words will be roughly 170 pages. So, that's about 353 words per-page.
Good luck with writing this week! <3