CCEA A level Biology grade boundaries
CCEA A level Biology grade boundaries for 8 series, June 2017 to June 2026, for the qualification as a whole and for each paper. Each table shows the lowest mark that got each grade, copied from CCEA's own document, which is linked underneath.
June 2026 CCEA A level Biology grade boundaries
Newest
| Qualification or route | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| AS (uniform marks) | 240 | not available | 19280% | 16870% | 14460% | 12050% | 9640% |
| A level (uniform marks) | 600 | not available | 48080% | 42070% | 36060% | 30050% | 24040% |
| Unit | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| Molecules & CellsSBY1 | 75 | not available | 5877.3% | 5370.7% | 4864% | 4357.3% | 3850.7% |
| Organisms & BiodiversitySBY2 | 75 | not available | 5776% | 5168% | 4560% | 4053.3% | 3546.7% |
| Practical Skills in AS BiologySBY3 | 71 | not available | 5374.6% | 4867.6% | 4360.6% | 3853.5% | 3447.9% |
| Physiology, Co-ordination & Control & EcosystemsABY1 | 100 | not available | 7575% | 6666% | 5757% | 4848% | 3939% |
| Biochemistry, Genetics & Evolutionary TrendsABY2 | 100 | not available | 7676% | 6464% | 5252% | 4040% | 2929% |
| Practical Skills in BiologyABY3 | 75 | not available | 5776% | 5066.7% | 4357.3% | 3648% | 3040% |
- Unit boundaries are raw marks. Each unit mark is converted to a uniform mark, and the AS and A level grades come from the total uniform marks shown in the first table.
- A* at A level has no boundary of its own: it needs grade A overall and at least 90% of the uniform marks available on the A2 units.
Source: CCEA grade boundaries, A level Biology June 2026 (opens ccea.org.uk in a new tab)
Use these on your question decks: keep them in your account, then choose them on any deck's Grade boundaries page to see your predicted grade against them.
June 2025 CCEA A level Biology grade boundaries
| Qualification or route | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| AS (uniform marks) | 240 | not available | 19280% | 16870% | 14460% | 12050% | 9640% |
| A level (uniform marks) | 600 | not available | 48080% | 42070% | 36060% | 30050% | 24040% |
| Unit | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| Molecules & CellsSBY1 | 75 | not available | 5776% | 5168% | 4661.3% | 4154.7% | 3648% |
| Organisms & BiodiversitySBY2 | 75 | not available | 5978.7% | 5472% | 4965.3% | 4458.7% | 3952% |
| Practical Skills in AS BiologySBY3 | 71 | not available | 5577.5% | 4969% | 4462% | 3954.9% | 3447.9% |
| Physiology, Co-ordination & Control & EcosystemsABY1 | 100 | not available | 6969% | 5959% | 4949% | 4040% | 3131% |
| Biochemistry, Genetics & Evolutionary TrendsABY2 | 100 | not available | 6868% | 5656% | 4545% | 3434% | 2323% |
| Practical Skills in BiologyABY3 | 75 | not available | 6080% | 5269.3% | 4458.7% | 3749.3% | 3040% |
- Unit boundaries are raw marks. Each unit mark is converted to a uniform mark, and the AS and A level grades come from the total uniform marks shown in the first table.
- A* at A level has no boundary of its own: it needs grade A overall and at least 90% of the uniform marks available on the A2 units.
Source: CCEA grade boundaries, A level Biology June 2025 (opens ccea.org.uk in a new tab)
Use these on your question decks: keep them in your account, then choose them on any deck's Grade boundaries page to see your predicted grade against them.
June 2024 CCEA A level Biology grade boundaries
| Qualification or route | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| AS (uniform marks) | 240 | not available | 19280% | 16870% | 14460% | 12050% | 9640% |
| A level (uniform marks) | 600 | not available | 48080% | 42070% | 36060% | 30050% | 24040% |
| Unit | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| Molecules & CellsSBY1 | 75 | not available | 5978.7% | 5370.7% | 4762.7% | 4154.7% | 3546.7% |
| Organisms & BiodiversitySBY2 | 75 | not available | 5472% | 4864% | 4256% | 3648% | 3141.3% |
| Practical Skills in AS BiologySBY3 | 71 | not available | 5273.2% | 4664.8% | 4157.7% | 3650.7% | 3143.7% |
| Physiology, Co-ordination & Control & EcosystemsABY1 | 100 | not available | 7575% | 6464% | 5454% | 4444% | 3434% |
| Biochemistry, Genetics & Evolutionary TrendsABY2 | 100 | not available | 7373% | 6161% | 4949% | 3737% | 2525% |
| Practical Skills in BiologyABY3 | 75 | not available | 5573.3% | 4762.7% | 3952% | 3141.3% | 2432% |
- Unit boundaries are raw marks. Each unit mark is converted to a uniform mark, and the AS and A level grades come from the total uniform marks shown in the first table.
- A* at A level has no boundary of its own: it needs grade A overall and at least 90% of the uniform marks available on the A2 units.
Source: CCEA grade boundaries, A level Biology June 2024 (opens ccea.org.uk in a new tab)
Use these on your question decks: keep them in your account, then choose them on any deck's Grade boundaries page to see your predicted grade against them.
June 2023 CCEA A level Biology grade boundaries
| Qualification or route | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| AS (uniform marks) | 240 | not available | 19280% | 16870% | 14460% | 12050% | 9640% |
| A level (uniform marks) | 600 | not available | 48080% | 42070% | 36060% | 30050% | 24040% |
| Unit | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| Molecules & CellsSBY1 | 75 | not available | 5674.7% | 4965.3% | 4357.3% | 3749.3% | 3141.3% |
| Organisms & BiodiversitySBY2 | 75 | not available | 5269.3% | 4661.3% | 4053.3% | 3445.3% | 2938.7% |
| Practical Skills in AS BiologySBY3 | 71 | not available | 5780.3% | 4867.6% | 4056.3% | 3245.1% | 2433.8% |
| Physiology, Co-ordination & Control & EcosystemsABY1 | 100 | not available | 6565% | 5555% | 4545% | 3535% | 2525% |
| Biochemistry, Genetics & Evolutionary TrendsABY2 | 100 | not available | 7373% | 6161% | 4949% | 3838% | 2727% |
| Practical Skills in BiologyABY3 | 75 | not available | 5066.7% | 4154.7% | 3242.7% | 2330.7% | 1520% |
- Unit boundaries are raw marks. Each unit mark is converted to a uniform mark, and the AS and A level grades come from the total uniform marks shown in the first table.
- A* at A level has no boundary of its own: it needs grade A overall and at least 90% of the uniform marks available on the A2 units.
Source: CCEA grade boundaries, A level Biology June 2023 (opens ccea.org.uk in a new tab)
Use these on your question decks: keep them in your account, then choose them on any deck's Grade boundaries page to see your predicted grade against them.
June 2022 CCEA A level Biology grade boundaries
| Qualification | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| A level (uniform marks) | 600 | not available | 48080% | 42070% | 36060% | 30050% | 24040% |
| Unit | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| A2 1ABY1 | 100 | not available | 6363% | 5151% | 3939% | 2727% | 1515% |
| A2 2ABY2 | 100 | not available | 5757% | 4545% | 3333% | 2121% | 1010% |
| A2 3ABY3 | 75 | not available | 4762.7% | 3749.3% | 2837.3% | 1925.3% | 1013.3% |
- Unit boundaries are raw marks. Each unit mark is converted to a uniform mark, and the AS and A level grades come from the total uniform marks shown in the first table.
- A* at A level has no boundary of its own: it needs grade A overall and at least 90% of the uniform marks available on the A2 units.
- CCEA published the AS boundaries for this series in a separate document.
Source: CCEA grade boundaries, A level Biology June 2022 (opens ccea.org.uk in a new tab)
Use these on your question decks: keep them in your account, then choose them on any deck's Grade boundaries page to see your predicted grade against them.
June 2019 CCEA A level Biology grade boundaries
| Qualification or route | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| AS (uniform marks) | 240 | not available | 19280% | 16870% | 14460% | 12050% | 9640% |
| A level (uniform marks) | 600 | not available | 48080% | 42070% | 36060% | 30050% | 24040% |
| Unit | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| Molecules & CellsSBY1 | 75 | not available | 5370.7% | 4864% | 4357.3% | 3850.7% | 3344% |
| Organisms & BiodiversitySBY2 | 75 | not available | 5269.3% | 4762.7% | 4256% | 3749.3% | 3242.7% |
| Practical Skills in AS BiologySBY3 | 71 | not available | 5881.7% | 5171.8% | 4462% | 3853.5% | 3245.1% |
| Physiology, Co-ordination & Control & EcosystemsABY1 | 100 | not available | 7171% | 6363% | 5555% | 4747% | 3939% |
| Biochemistry, Genetics & Evolutionary TrendsABY2 | 100 | not available | 6161% | 5252% | 4343% | 3434% | 2525% |
| Practical Skills in BiologyABY3 | 75 | not available | 5472% | 4762.7% | 4053.3% | 3445.3% | 2837.3% |
- Unit boundaries are raw marks. Each unit mark is converted to a uniform mark, and the AS and A level grades come from the total uniform marks shown in the first table.
- A* at A level has no boundary of its own: it needs grade A overall and at least 90% of the uniform marks available on the A2 units.
Source: CCEA grade boundaries, A level Biology June 2019 (opens ccea.org.uk in a new tab)
Use these on your question decks: keep them in your account, then choose them on any deck's Grade boundaries page to see your predicted grade against them.
June 2018 CCEA A level Biology grade boundaries
| Qualification or route | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| AS (uniform marks) | 240 | not available | 19280% | 16870% | 14460% | 12050% | 9640% |
| A level (uniform marks) | 600 | not available | 48080% | 42070% | 36060% | 30050% | 24040% |
| Unit | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| AS 1SBY1 | 75 | not available | 5269.3% | 4762.7% | 4256% | 3749.3% | 3242.7% |
| AS 2SBY2 | 75 | not available | 5269.3% | 4762.7% | 4256% | 3749.3% | 3242.7% |
| AS 3SBY3 | 71 | not available | 5273.2% | 4664.8% | 4056.3% | 3447.9% | 2839.4% |
| A2 1ABY1 | 100 | not available | 7272% | 6363% | 5454% | 4646% | 3838% |
| A2 2ABY2 | 100 | not available | 6363% | 5454% | 4545% | 3636% | 2727% |
| A2 3ABY3 | 75 | not available | 5674.7% | 4965.3% | 4256% | 3648% | 3040% |
- Unit boundaries are raw marks. Each unit mark is converted to a uniform mark, and the AS and A level grades come from the total uniform marks shown in the first table.
- A* at A level has no boundary of its own: it needs grade A overall and at least 90% of the uniform marks available on the A2 units.
Source: CCEA grade boundaries, A level Biology June 2018 (opens ccea.org.uk in a new tab)
Use these on your question decks: keep them in your account, then choose them on any deck's Grade boundaries page to see your predicted grade against them.
June 2017 CCEA A level Biology grade boundaries
| Qualification | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| AS (uniform marks) | 240 | not available | 19280% | 16870% | 14460% | 12050% | 9640% |
| Unit | Max mark | Grade: lowest mark, and % of max mark | |||||
|---|---|---|---|---|---|---|---|
| Grade A* | Grade A | Grade B | Grade C | Grade D | Grade E | ||
| AS 1SBY1 | 75 | not available | 4965.3% | 4357.3% | 3850.7% | 3344% | 2837.3% |
| AS 2SBY2 | 75 | not available | 5370.7% | 4762.7% | 4154.7% | 3648% | 3141.3% |
| AS 3SBY3 | 71 | not available | 4969% | 4360.6% | 3752.1% | 3143.7% | 2535.2% |
- Unit boundaries are raw marks. Each unit mark is converted to a uniform mark, and the AS and A level grades come from the total uniform marks shown in the first table.
- CCEA’s document for this series covers AS only.
Source: CCEA grade boundaries, A level Biology June 2017 (opens ccea.org.uk in a new tab)
Use these on your question decks: keep them in your account, then choose them on any deck's Grade boundaries page to see your predicted grade against them.
Common questions
What were the Biology grade boundaries in June 2026?
In June 2026, an A needed 192 out of 240 uniform marks and an E needed 96 on AS (uniform marks). On A level (uniform marks), an A needed 480 out of 600 uniform marks and an E needed 240. The full table, with the boundaries for each paper, is at the top of this page.
Where do these CCEA A level Biology grade boundaries come from?
Every number is copied from CCEA's own published grade boundary document for that series, which is linked under each table. We lay them out by course so you don't have to search a document covering every subject, and nothing is changed or estimated.
Why do grade boundaries change every year?
Boundaries are set after each exam has been marked, so that a grade means the same standard even when one year's paper is harder than another's. A harder paper usually has lower boundaries. That is why an old paper is best marked against its own year's boundaries, which is what the tables here are for.
When are new Biology grade boundaries published?
CCEA publishes grade boundaries on results day: for summer exams that is mid August for A levels and a week later for GCSEs, and November and January series get theirs on their own results days. We add them here after that, usually well before the papers themselves are released.
More grade boundaries: every CCEA course or every board.
cookie is independent and is not affiliated with or endorsed by any exam board. Every paper here is a link to the board's own copy on its own website, and the papers belong to the boards that set them. If a link has stopped working, the board's own past paper page is linked on each course. The grade boundaries are copied from the boards’ own published documents, each linked under its table.