In Portuguese middle-schools, a five-point grading scale is used, where: In high-schools and universities, a 20-point grading scale is used.
When it is the case of the final grade of an academic degree, each grade is assigned a qualitative mark by degree (depending on the university, the students have at most a final grade of 16 or 17, being almost impossible for students to have a final score between 18-20): [1]