What Is the A Level Grading System and How Does It Work?
The A Level grading system awards letter grades from A* to E based on a student’s total marks across all exam papers in a subject, converted into a percentage band based on grade boundaries set by exam boards after each series. There’s no fixed percentage for an A or a B. Grade boundaries shift every year depending on how difficult that year’s papers turned out to be, which is exactly why two students who sit different years can score the same grade off different raw marks. If you’re trying to make sense of a UCAS offer, a school report, or your own exam result slip, this guide breaks down exactly how the a level grading system works, who sets the boundaries, and what each grade actually means for your next step. How A Level Grading System works? Each A Level subject is marked out of a total number of raw marks, usually somewhere between 200 and 300 depending on the exam board and how many papers make up the qualification. Once every student’s script has been marked, the exam board looks at the overall distribution of marks that year and decides where each grade boundary falls. This process is called grade boundary setting, and it happens after the exams, not before. A senior examiner reviews scripts sitting right on the border between two grades, checking whether the work genuinely matches the standard expected for the higher grade. Only then are the final boundaries confirmed and published, usually alongside results day in August. Six grades are possible at A Level: A*, A, B, C, D and E. Below E, a student receives a U, meaning unclassified, which does not count as a pass. The A* grade sits apart from the rest of the a level grading system, since it isn’t decided purely on the raw mark total. The A* Grade Explained To be awarded an A*, a student must first achieve an A grade overall, then also score 90% or above on the combined marks from their A2 papers specifically, which are the papers sat in the second year of the course. AS marks from the first year don’t count toward the A* calculation at all. This two-part condition exists because Ofqual introduced the A* in 2010 to help universities distinguish between top performers when so many students were achieving straight As. A student can score 85% overall across the full course and still miss the A* if their second-year performance dips below that 90% threshold, even with a strong first year behind them. Cambridge Grading System A Level vs UK Boards Students sitting Cambridge International A Levels (CAIE) follow a broadly similar structure to UK exam boards like AQA, Edexcel and OCR, but with a few real differences worth knowing. The cambridge grading system a level uses the same A* to E scale, yet Cambridge publishes indicative grade thresholds for each component alongside the overall subject grade, giving students a clearer sense of how marks in individual papers contributed to the final result. Cambridge also runs two exam series a year, in June and November, compared to the single June series most UK boards rely on for the majority of entries. Students often land in this system straight after choosing between GCSE vs IGCSE at the earlier stage, and the two qualifications diverge more in structure and pacing than in the underlying grading philosophy. How Grading Plays Out Differently Across Subjects The a level grading system uses one shared scale, but what costs a student marks looks completely different depending on the subject. In English Literature or History, most marks sit in extended essay responses, and grade boundaries often hinge on how consistently a student can build an argument under time pressure across three or four essays in one sitting, rather than on any single fact recalled correctly. In Mathematics and Further Maths, marks are awarded method by method within a working, which means a student can lose a final answer but still bank most of the marks if the working shown is correct up to the error. Chemistry and Biology sit somewhere in between: multiple-choice and short-answer sections reward precision and command words like “explain” versus “describe,” while longer application questions test whether a student can transfer a concept to an unfamiliar context rather than just recite it. Physics tends to sit at the stricter end of this range, since a large share of the paper is calculation-based and a single sign error or missing unit can cost a mark that a similarly-sized slip in an essay subject wouldn’t. That’s part of why so many marks lost by otherwise strong physics students trace back to technique rather than a gap in understanding, the kind of avoidable error covered under common mistakes in A Level Physics that examiner reports flag every year. AS Level vs A2: How the Two Years Combine Since the 2015 curriculum reforms in England, AS and A2 have been decoupled. AS Level is now a standalone qualification worth half the UCAS points of a full A Level, and in most subjects it no longer counts toward the final A Level grade at all. Scotland, Wales and international Cambridge entries handle this differently, so the rules depend heavily on where a student is studying. For students in England sitting linear A Levels, that means the final grade rests entirely on exams taken at the end of the second year, covering the full two years of content in one sitting. A student who coasted through year 12 content can’t rely on banked AS marks to soften a rough final exam season, whatever the subject, whether that means two years of vocabulary and grammar resurfacing at once in a language paper or two years of formulae and derivations all being fair game in a single sitting for sciences and maths. What Each Grade Actually Means A U grade means a student’s marks fell below the threshold for an E, and the qualification is not awarded. An E is