UK GCSE Grades 9-1 Explained: What Replaced A* to G and What Counts as a Pass

GCSEs in England are graded from 9 down to 1, with 9 the highest, replacing the old A* to G letters. The switch confused parents and employers alike, because the new numbers deliberately do not map one-to-one onto the old letters.

From A*-G to 9-1: what changed and why

England moved GCSEs to the 9-1 scale in phases starting with English and maths in 2017, alongside reformed, more demanding courses. The stated goals were to signal the new curriculum and to add differentiation at the top: the single A* band became grades 8 and 9, so a 9 identifies the very strongest performances. Wales and Northern Ireland kept letter-based GCSE grading, so 9-1 is specifically the English system.

How the numbers line up with the old letters

The alignment is anchored at a few fixed points rather than being a clean one-to-one mapping:

• Grade 9: above the old A*, awarded to roughly the top fifth of those achieving grade 7 and above
• Grade 8: between A* and A
• Grade 7: aligned with the bottom of the old A
• Grades 6 and 5: span the old B and high C
• Grade 4: aligned with the bottom of the old C
• Grades 3, 2, 1: span the old D, E, F and G
• U: ungraded, below grade 1

What actually counts as a pass

Officially there are two thresholds. A grade 4 is a standard pass: it is the level most sixth forms, colleges and employers treat as the baseline, and students who miss a 4 in English or maths generally must continue studying those subjects. A grade 5 is a strong pass, used in school performance tables and increasingly requested by competitive sixth forms for specific subjects. Individual schools and courses set their own entry requirements, so a 6 in maths might be required for A-level maths even though a 4 is a pass.

Grade boundaries: why 9-1 is not a percentage scale

There is no fixed rule like 90% = grade 9. Exam boards (AQA, Edexcel, OCR and others) set grade boundaries after marking each series, adjusting for how hard the papers turned out to be, so the raw mark needed for a 7 in one summer can differ from the next. As a concrete illustration of the idea, if a paper is out of 200 and the grade 7 boundary lands at 138, a raw score of 140 is a 7 while 136 is a 6, even though both are 70% plus or minus a whisker. Only the published boundaries for your exact board, subject and year matter.

Tracking GCSE progress through the year

Mock results, assessed homework and end-of-topic tests all arrive on the 9-1 scale, and keeping a running picture per subject helps you spot problems before the real exams. GradeBuddy supports the UK 9-1 scale natively, with weighted categories per subject and a term overview, so you always know where each subject stands.