WJEC GCSE Combined Science (Science Double Award) grade boundaries 2025
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WJEC GCSE Combined Science grade boundaries June 2025
Science (Double Award) is the Welsh double science GCSE, worth two GCSEs. WJEC publishes its fixed totals in the overall UMS document and each unit's raw marks in the grade converter. This page copies both for June 2025.
The fifteen double grades
A double grade gives one letter for each of the two GCSEs. The scale runs from A*A* down to GG, and each step is 40 uniform marks.
| Double grade | Uniform marks, out of 800 |
|---|---|
| A*A* | 720 |
| A*A | 680 |
| AA | 640 |
| AB | 600 |
| BB | 560 |
| BC | 520 |
| CC | 480 |
| CD | 440 |
| DD | 400 |
| DE | 360 |
| EE | 320 |
| EF | 280 |
| FF | 240 |
| FG | 200 |
| GG | 160 |
Foundation raw marks, 2025
| Foundation, 2025 | C | D | E | F | G |
|---|---|---|---|---|---|
| Unit 1 Biology 1 | 30 | 25 | 21 | 17 | 13 |
| Unit 2 Chemistry 1 | 32 | 27 | 23 | 19 | 15 |
| Unit 3 Physics 1 | 29 | 24 | 19 | 15 | 11 |
| Unit 4 Biology 2 | 38 | 34 | 30 | 27 | 24 |
| Unit 5 Chemistry 2 | 34 | 30 | 26 | 22 | 18 |
| Unit 6 Physics 2 | 26 | 22 | 19 | 16 | 13 |
Higher raw marks, 2025
| Higher, 2025 | A* | A | B | C | D | E |
|---|---|---|---|---|---|---|
| Unit 1 Biology 1 | 41 | 32 | 23 | 15 | 10 | 7 |
| Unit 2 Chemistry 1 | 47 | 38 | 29 | 20 | 14 | 11 |
| Unit 3 Physics 1 | 40 | 32 | 24 | 16 | 12 | 8 |
| Unit 4 Biology 2 | 45 | 37 | 29 | 22 | 15 | 11 |
| Unit 5 Chemistry 2 | 41 | 32 | 24 | 16 | 12 | 9 |
| Unit 6 Physics 2 | 37 | 30 | 22 | 15 | 12 | 9 |
Unit 7, the practical, 2025
| Grade | Raw mark, 2025 | Uniform marks (out of 80) |
|---|---|---|
| A* | 50 | 72 |
| A | 42 | 64 |
| B | 34 | 56 |
| C | 26 | 48 |
| D | 22 | 40 |
| E | 18 | 32 |
| F | 14 | 24 |
| G | 10 | 16 |
How each unit is worth the same
The specification gives each of the six written units 60 marks, 1 hour 15 minutes and 15% of the grade, so each is out of 120 uniform marks. The practical is 10%, which is 80 uniform marks. A Higher candidate with an A on a unit has 96 uniform marks and a Foundation C has 72. WJEC's UMS document caps the Foundation tier one mark below the B boundary, so no Foundation unit can give more than 83.
In 2025 the cap arrived early on some papers. Foundation Biology 1 reached 83 at 35 raw marks, Foundation Biology 2 at 42, and Foundation Physics 2 at 30.
A Foundation example
A Foundation candidate scores 28, 30, 24, 34, 32 and 24 in Units 1 to 6, and 36 in the practical. The converter gives 67, 67, 60, 60, 66, 66, 58 uniform marks and a total of 444 out of 800. That is above the CD boundary of 440 and 36 marks short of CC at 480.
What happened in Wales in 2025
JCQ's Wales release for 21 August 2025 says 7.5% of Science Double Award candidates got A*/9 to A/7 and 50.0% got C/4 or above. The separate sciences did far better on top grades, with 41.8% in Biology, 42.1% in Chemistry and 44.4% in Physics, though JCQ says the two routes are the same standard. Our guide to GCSE grades in Wales explains how it is reported.
Compare with 2026
In June 2026 the Chemistry 2 and Physics 2 raw marks rose by 3 to 6, while Foundation Physics 1 slipped to 25 for a C. The 2026 page lays out the whole set.
Things to remember
- It is a total, not a pass mark per unit. You do not need a C on every paper to get CC overall.
- Each unit converts on its own table. The same raw mark in two units gives different uniform marks.
- The practical counts for 10%. Its A* was 50 raw marks in 2025.
Check your level with a daily paper
Try Combined Science Foundation or Combined Science Higher. They are 8-question papers worth 25 to 35 marks, written by us and not by WJEC. A paper is a sample, so check your average across several before judging.
Common questions
What were the WJEC Science Double Award grade boundaries in 2025?
How many marks is a CC in WJEC Combined Science?
What raw mark was a Higher A on Chemistry 1 in 2025?
What does an AB mean?
Are the totals different in 2026?
Is the practical tiered?
Revision cards
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UK · GCSEWJEC GCSE Combined Science grade boundaries 2026WJEC's June 2026 Science (Double Award) boundaries: double grades out of 800, raw marks for all seven units and the move from 2025.