The JLPT uses a scaled scoring system so there isn't a simple correspondance in terms of number of points per question.
There also is no longer any set vocabulary list, so you cannot guarantee that only words on a set list will appear. This was deliberately done to discourage cramming from word lists. Just something to be aware of.
That said, I agree with nahadef - if you do okay on sample tests, you'll probably be fine. Try doing one under timed conditions if you haven't already, because for many people time management is an issue, particularly for the reading section.