SAT computes a scaled scored based on your raw scores.
This is the number of points you earned, based on the number of questions you answered correctly, minus a fraction of the number answered incorrectly. Questions you skipped are not counted and no points are subtracted for incorrect Student Produced Response mathematics questions (grid-ins).
Your raw score is then converted to a scaled score (reported on a 200-800 scale) by a statistical process called equating to ensure that the different forms of the test or the level of ability of the students with whom you are tested do not affect your score.
You will get a scaled score (reported on a 200-800 scale) in this manner for your Critical Reading and Mathematics sections.
The scores for the writing section has two components and one composite scaled score.
Every SAT Reasoning test includes a 25-minute section, which doesn't count toward your final score. Please remember that you won't be able to tell which section is the unscored section. It may be a critical reading, mathematics, or multiple-choice writing section.