WJEC A-level Biology grade boundaries 2025: what each unit needed
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WJEC A-level Biology grade boundaries June 2025
Every WJEC A level unit has an A to E scale of uniform marks that does not change from year to year. For Biology (1400), Units 1 and 2 are worth 100, Units 3 and 4 are worth 125 and the practical, Unit 5, is worth 50, which adds to 500. The specification gives the unit titles.
| Unit | A | B | C | D | E |
|---|---|---|---|---|---|
| Biology AS Unit 1 | 80 | 70 | 60 | 50 | 40 |
| Biology AS Unit 2 | 80 | 70 | 60 | 50 | 40 |
| Biology A2 Unit 3 | 100 | 88 | 75 | 63 | 50 |
| Biology A2 Unit 4 | 100 | 88 | 75 | 63 | 50 |
| Biology A2 Unit 5 | 40 | 35 | 30 | 25 | 20 |
Raw marks per unit, 2025
The raw marks below are from the 2025 grade converter. The last column shows the A boundary's movement in 2026.
| Unit | A, 2025 | B | C | D | E | A, change on 2026 |
|---|---|---|---|---|---|---|
| AS Unit 1 | 47 | 40 | 33 | 26 | 19 | +3 |
| AS Unit 2 | 41 | 35 | 29 | 24 | 19 | −1 |
| A2 Unit 3 | 53 | 45 | 37 | 30 | 23 | +3 |
| A2 Unit 4 | 48 | 41 | 34 | 28 | 22 | −1 |
| A2 Unit 5 | 35 | 31 | 28 | 25 | 22 | 0 |
Totting up a candidate
A candidate with raw marks of 44, 38, 50, 46 and 33 converts to 76, 75, 96, 97, 38, a total of 382. In 2025 that earns a B, with the B line at 350 and A 18 marks away at 400. The A2 units add 231, which falls short of the 270 needed for an A*.
How wide each unit is
The gap between an E and an A tells you how much room a unit gives you. In 2025 it was 28 raw marks in Unit 1, 22 in Unit 2, 30 in Unit 3, 26 in Unit 4 and 13 in the practical. The practical has the narrowest range, so a few marks there move the grade a long way.
Senedd Research reports 29.5% of A level grades in Wales at A* or A in 2025, and 77.2% at A* to C.
Because the grade is the sum of uniform marks, there is no need to hit every unit's A. A candidate can drop 10 uniform marks in one unit and recover them in another, and the total decides the grade. Only the A* test looks at the A2 units on their own, so a revision plan for an A* should weight Units 3 to 5.
What stands out in 2025
- Unit 3 was the highest. An A needed 53 raw marks.
- The practical is steady. It needed 35 for an A in both 2025 and 2026.
- The A* depends on the second year. You need 270 uniform marks from Units 3 to 5.
Compare yourself with a daily paper
Use A-level Biology Year 1 or Year 2. Each has 8 questions and 25 to 35 marks, written by us, not WJEC. Compare your share with 80% for an A and 40% for an E, and remember it is only a pointer.
Common questions
What were the WJEC A-level Biology boundaries in 2025?
What raw mark was an A in Biology Unit 3 in 2025?
What was an E in Biology Unit 1 in 2025?
When was 2025 results day?
Revision cards
Cover the back, say it, flip.
Where to go next
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UK · A-levelWJEC A-level Biology grade boundaries 2026WJEC A-level Biology 2026 boundaries: raw marks for the five units, the fixed UMS totals and A* rule, and how the A boundary moved from 2025.