WJEC GCSE grade boundaries 2025: what each grade needed

WJEC GCSE grade boundaries June 2025

The raw-mark tables are in WJEC's GCSE Grade Points (Non Uniform Mark), June 2025. The sheet covers the reformed Welsh GCSEs that are linear, where every component is sat in one series and added into one total. The unitised sciences are in a second WJEC file, Overall GCSE UMS Grade Boundaries and Unit Information. Every table below is a straight copy of those files.

GCSE Maths grade boundaries 2025, tier by tier

Higher gives A* to C, Intermediate gives B to E and Foundation gives D to G (3300 specification). Mathematics-Numeracy (3310) is a separate qualification sat alongside it in Wales, with its own boundaries. A cell is the lowest total that earns the grade, out of 160 marks (130 on Foundation).

Subject by subject, see Maths, Biology, Chemistry, Physics, Science (Double Award) and Computer Science.

GCSE Computer Science grade boundaries 2025

The science totals: fixed, like every year

Biology, Chemistry and Physics each have a maximum of 400 uniform marks, with A* at 360, A at 320, B at 280, C at 240, D at 200, E at 160, F at 120 and G at 80. Science (Double Award) has 800, with A*A* at 720 and GG at 160. WJEC states that UMS boundaries remain the same every year, so these totals also apply in 2026.

How to read WJEC's linear sheet

Each qualification has a row of overall boundaries and a row for each unit under it. A unit row shows its maximum mark, a weighting factor, and its notional boundaries. WJEC says the highlighted boundaries were set by professional judgement, and that component boundaries are "notional", a guide for teachers and not official grades. They may not add up to the overall boundary where marks have been scaled.

The weighting factor is how the unit feeds the total. In Computer Science, Unit 1 (100 marks) and Unit 2 (60 marks) have a factor of 2.0 and Unit 3 (80 marks) has 1.0, so the total is 200 plus 120 plus 80, which is 400. A candidate with 64, 38 and 52 would have 128, 76 and 52 weighted marks. That is 256, above the A boundary of 249 and 44 short of the A* boundary of 300.

A unitised example

For Chemistry, the 2025 converter gives a Higher tier candidate 131 uniform marks for 31 raw marks on Unit 1 and 137 for 40 raw marks on Unit 2. A raw 17 on the practical Unit 3 is 28 uniform marks. The sum is 296, above the B boundary of 280 and 24 short of the A boundary of 320.

What happened in Wales in 2025

The JCQ Wales release for 21 August 2025 counted 307,089 GCSE entries, 3.0% down on 2024. It reported 19.5% of candidates at A*/9 to A/7 and 62.5% at C/4 or above. In Mathematics the figures were 13.4% and 49.0%, and in Mathematics-Numeracy 13.6% and 52.1%. For Biology, Chemistry and Physics, 41.8%, 42.1% and 44.4% reached A*/9 to A/7, and 7.5% did in Science Double Award. Our guide to Welsh GCSE grades explains the paired labels.

What the 2025 boundaries tell you

• The same letter means different shares. A C on the Higher tier was 29 of 160 marks in 2025, about 18%. A C on the Intermediate tier was 69 of 160, about 43%. The papers differ, so the boundaries do too.
• Tier choice sets the ceiling. Foundation tops out at a D, Intermediate at a B and Higher at an A*. The tier is decided before the exam, not after.
• Raw boundaries move. They changed between 2025 and 2026, and the 2026 page shows by how much.

Turn today's paper into a rough grade

Sit a paper from our GCSE papers, such as Maths Foundation, under timed conditions, then mark it. Our papers are short, with 8 questions and 25 to 35 marks, and they are not WJEC's. Divide your mark by the paper's total. If you get 18 out of 30, that is 60%, and a Foundation D was 65 out of 130, or 50%, so it points above a D. A single paper is a rough pointer. Take the average over a week with the Mean, Median and Mode Calculator.

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UK · GCSEWJEC GCSE Maths grade boundaries 2025: A* to G by tierWJEC's June 2025 GCSE Maths boundaries for Foundation, Intermediate and Higher tiers, each as a share of the marks, unit boundaries and a worked grade.