There's no such thing as a page requirement for chapters. You don't even need chapters, though they acts as signals to your readers that "here is a good place to pause if you need to".
Just be sure that your chapter breaks make sense and don't cut things off-mid scene.
What Kyllorac said, but the average book page contains 250 words and the average chapter is 10 pages long. So, if you're unsure about length, 2500 words a chapter is a good guide.
I've wondered about this in the past, and did a bit of research online, and observed approximate counts from books I've read. A typical chapter may be from 4,000-6,000 words, 2,500 words for a briefer chapter, or even 7,000 for a more extensive one. However, I've seen authors pull off chapters of less than 600 words, even one sentence long chapters.
What I recommend is try working without chapter breaks, only breaks in scene. Then, try and determine from what you have where it is best to give a break.
