WJEC GCSE Chemistry grade boundaries 2025: what each grade needed

WJEC GCSE Chemistry grade boundaries June 2025

WJEC's overall UMS document fixes the total grade boundaries for Chemistry (3410), and its grade converter gives the raw marks per unit for June 2025. Here is the fixed part:

Chemistry Foundation raw marks, 2025

Chemistry Higher raw marks, 2025

Chemistry practical (Unit 3), 2025

One C, two tiers

A written unit's C is worth 108 uniform marks on either tier, but the raw mark that earns it depends on the tier. According to the specification the written units are 80 marks, so the second table shows each C as a share.

On Unit 2, a Foundation C needed 56% of the marks and a Higher C only 25%. It is not a lower standard. The Higher paper is set differently, and the raw mark is only a bridge to the uniform mark. That is why you should never compare raw boundaries between tiers.

A Foundation example

Suppose a Foundation candidate gets 40 on Unit 1, 44 on Unit 2 and 17 on the practical. The converter gives 111, 105 and 28, so the total is 244 out of 400. That is 4 marks over the C boundary of 240, so the grade is a C. Foundation stops at C, so this candidate sits at the top of the tier.

How Wales did in Chemistry in 2025

JCQ's Wales release for 21 August 2025 shows 42.1% of Chemistry results at A*/9 to A/7 and 88.7% at C/4 or above. The Physics figures were 44.4% and 90.0% and the Biology figures 41.8% and 86.7%.

Then came 2026

The Higher raw marks rose by 4 to 8 at A* to C in Unit 1 in 2026, and the Foundation Unit 1 G dropped from 15 to 9. You can compare both years on the 2026 Chemistry page. The uniform totals stayed the same.

What to take from the 2025 table

• Unit 2 asked for more raw marks on Foundation. Its C needed 45 against 39 for Unit 1.
• The Higher A* sat high. An A* needed 52 in Unit 1 and 58 in Unit 2, with an A at 40 and 45.
• Practise the units separately. They carry equal weight, 45% each, so a gap in one shows up in the total.

Use a daily paper to check yourself

Try Chemistry Foundation or Chemistry Higher. Each is 8 questions and 25 to 35 marks, written by us, not WJEC. Note which topics cost you marks. If you drop marks on calculation questions, return to the method and redo them. One paper is a sample, so use the average over several.

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UK · GCSEWJEC GCSE Chemistry grade boundaries 2026: marks per gradeWJEC's June 2026 GCSE Chemistry boundaries: the fixed UMS totals, raw marks for Units 1 to 3 on both tiers, and the move from 2025.