Do I need to be good at calculus before entering engineering?

You do not necessarily need to be good at calculus before entering engineering. However, many engineering fields use differentiation and integration in university courses, so reviewing the basics of high-school mathematics—functions, trigonometric functions, exponents and logarithms, and limits—can make learning easier. If you struggle, you may be able to catch up through remedial support or self-study. Because entrance-exam subjects and the pace after admission vary by university and department, check the official curriculum and pre-entry study guidance.