My advice is to only make the chapters as long or short as they need to be.
Don't try to reach a predetermined word count in each chapter as it will end up dragging the story down in both ways for something as silly as a number that doesn't really matter in the end. If the idea of the chapter is short you will have to see how to stretch it, and if the idea is long but doesn't fit you will have to cutout things that you might want to tell or give a better context.
Just do the chapters as far as you think you have said all you have to say about it.
My chapters vary a lot depending on the topic of each one, usually one of a normal day in a coffee shop has a length of only 1 800 words, while in other occasions in a battle there are chapters of up to 10 000 words.
And to this day nobody has complained about it, because they are for the content, not a number. If a battle is interesting they don't mind if it is longer than normal, and the same happens the other way