Aah the eternal question! It's hard to tell, especially for universities in the US, AND especially if you are an international student applying for financial aid. Creating a strong college list is part art, part science, and plenty of gut feeling informed by data, extra curricular impact, personality, budget, citizenship, SAT scores and grades, race/ethnicity etc.
That said, you should have 2-3 REACH Schools this is where their admit rate is below 20%, you need 4-5 Target schools where your scores and GPA are in the range of the mid 50% the college admits, and then 2-3 Foundation schools where your scores are stronger than the student this school typically admits.
If you are an International Student seeking aid you need to understand that there is no such thing as safety for you, and you must aim t apply to schools where you are in the top 25% of students the school typically accepts.
Here's an example of a past AIMer who wanted to study Engineering. He was Jamaican and needed a full scholarship.
He had 5'1s in CAPE (Math plus 3 sciences) and a 1440 SAT super score, Math and Physics subject tests of 730 and 740 respectively.