Biology
The mark-to-grade calculator needs a verified cash-in composition. This qualification is Cambridge International route-based — the grade depends on which component combination was sat. The tables and trend graph below are fully live.
Component thresholds (minimum raw marks)
June 2026
| Component | Max | A* | A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|---|---|---|
| 11 | 40 | – | – | – | 27 | 24 | 21 | 18 | 15 |
| 12 | 40 | – | – | – | 25 | 22 | 19 | 16 | 13 |
| 13 | 40 | – | – | – | 23 | 20 | 17 | 14 | 11 |
| 17 | 40 | – | – | – | 27 | 24 | 21 | 18 | 15 |
| 21 | 40 | – | 31 | 26 | 21 | 18 | 16 | 14 | 12 |
| 22 | 40 | – | 31 | 25 | 20 | 18 | 15 | 13 | 11 |
| 23 | 40 | – | 32 | 28 | 24 | 22 | 19 | 17 | 15 |
| 27 | 40 | – | 31 | 26 | 21 | 18 | 16 | 14 | 12 |
| 31 | 80 | – | – | – | 41 | 34 | 27 | 21 | 15 |
| 32 | 80 | – | – | – | 43 | 38 | 32 | 27 | 22 |
| 33 | 80 | – | – | – | 39 | 34 | 28 | 22 | 16 |
| 41 | 80 | – | 48 | 37 | 25 | 22 | 19 | 16 | 13 |
| 42 | 80 | – | 48 | 39 | 28 | 23 | 18 | 13 | 8 |
| 43 | 80 | – | 53 | 42 | 31 | 27 | 23 | 19 | 15 |
| 50 | 90 | – | 75 | 66 | 57 | 49 | 41 | 33 | 25 |
| 51 | 40 | – | 30 | 24 | 19 | 17 | 15 | 12 | 9 |
| 52 | 40 | – | 34 | 29 | 24 | 21 | 19 | 17 | 15 |
| 53 | 40 | – | 32 | 26 | 21 | 19 | 17 | 14 | 11 |
| 61 | 40 | – | 31 | 25 | 20 | 18 | 16 | 14 | 12 |
| 62 | 40 | – | 34 | 29 | 25 | 22 | 19 | 17 | 15 |
| 63 | 40 | – | 31 | 26 | 22 | 19 | 16 | 13 | 10 |
November 2025
| Component | Max | A* | A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|---|---|---|
| 11 | 40 | – | – | – | 25 | 22 | 19 | 16 | 13 |
| 12 | 40 | – | – | – | 25 | 22 | 20 | 18 | 16 |
| 13 | 40 | – | – | – | 25 | 22 | 19 | 16 | 13 |
| 21 | 40 | – | 31 | 27 | 23 | 20 | 18 | 16 | 14 |
| 22 | 40 | – | 30 | 25 | 21 | 19 | 16 | 14 | 12 |
| 23 | 40 | – | 31 | 26 | 21 | 19 | 16 | 14 | 12 |
| 31 | 80 | – | – | – | 42 | 37 | 31 | 25 | 19 |
| 32 | 80 | – | – | – | 44 | 38 | 32 | 26 | 21 |
| 33 | 80 | – | – | – | 42 | 36 | 30 | 24 | 18 |
| 41 | 80 | – | 51 | 41 | 31 | 27 | 22 | 18 | 14 |
| 42 | 80 | – | 50 | 40 | 29 | 24 | 19 | 15 | 11 |
| 43 | 80 | – | 48 | 38 | 29 | 24 | 20 | 16 | 12 |
| 51 | 40 | – | 29 | 25 | 21 | 17 | 14 | 10 | 6 |
| 52 | 40 | – | 30 | 25 | 21 | 18 | 15 | 12 | 9 |
| 53 | 40 | – | 33 | 29 | 24 | 20 | 17 | 14 | 11 |
| 61 | 40 | – | 30 | 26 | 22 | 18 | 15 | 11 | 7 |
| 62 | 40 | – | 31 | 26 | 21 | 18 | 15 | 12 | 9 |
| 63 | 40 | – | 32 | 28 | 24 | 20 | 17 | 14 | 11 |
June 2025
| Component | Max | A* | A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|---|---|---|
| 11 | 40 | – | – | – | 26 | 23 | 20 | 17 | 14 |
| 12 | 40 | – | – | – | 25 | 22 | 19 | 16 | 13 |
| 13 | 40 | – | – | – | 27 | 24 | 22 | 20 | 18 |
| 21 | 40 | – | 30 | 24 | 19 | 17 | 15 | 13 | 12 |
| 22 | 40 | – | 32 | 27 | 23 | 20 | 17 | 15 | 13 |
| 23 | 40 | – | 29 | 24 | 20 | 18 | 16 | 14 | 12 |
| 31 | 80 | – | – | – | 47 | 40 | 32 | 25 | 18 |
| 32 | 80 | – | – | – | 42 | 37 | 31 | 26 | 21 |
| 33 | 80 | – | – | – | 43 | 38 | 33 | 27 | 22 |
| 41 | 80 | – | 45 | 34 | 22 | 19 | 15 | 12 | 9 |
| 42 | 80 | – | 55 | 45 | 33 | 28 | 22 | 16 | 10 |
| 43 | 80 | – | 48 | 38 | 26 | 22 | 17 | 13 | 9 |
| 51 | 40 | – | 30 | 24 | 19 | 17 | 15 | 12 | 9 |
| 52 | 40 | – | 31 | 27 | 23 | 20 | 18 | 15 | 13 |
| 53 | 40 | – | 27 | 22 | 18 | 15 | 13 | 11 | 9 |
| 61 | 40 | – | 31 | 25 | 20 | 17 | 15 | 13 | 11 |
| 62 | 40 | – | 32 | 27 | 23 | 20 | 18 | 15 | 13 |
| 63 | 40 | – | 28 | 23 | 19 | 16 | 14 | 12 | 10 |
November 2024
| Component | Max | A* | A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|---|---|---|
| 11 | 40 | – | – | – | 26 | 24 | 21 | 18 | 15 |
| 12 | 40 | – | – | – | 27 | 24 | 21 | 18 | 15 |
| 13 | 40 | – | – | – | 26 | 24 | 21 | 18 | 15 |
| 21 | 40 | – | 33 | 29 | 25 | 22 | 19 | 17 | 15 |
| 22 | 40 | – | 33 | 29 | 25 | 22 | 19 | 17 | 15 |
| 23 | 40 | – | 30 | 26 | 22 | 20 | 17 | 15 | 13 |
| 31 | 80 | – | – | – | 46 | 40 | 34 | 29 | 24 |
| 32 | 80 | – | – | – | 45 | 38 | 30 | 23 | 16 |
| 33 | 80 | – | – | – | 40 | 34 | 29 | 23 | 17 |
| 41 | 80 | – | 51 | 41 | 31 | 26 | 21 | 16 | 12 |
| 42 | 80 | – | 52 | 42 | 32 | 27 | 22 | 17 | 12 |
| 43 | 80 | – | 46 | 38 | 29 | 25 | 21 | 16 | 12 |
| 51 | 40 | – | 27 | 23 | 19 | 16 | 13 | 10 | 7 |
| 52 | 40 | – | 32 | 28 | 23 | 20 | 17 | 13 | 9 |
| 53 | 40 | – | 28 | 24 | 20 | 17 | 15 | 12 | 9 |
| 61 | 40 | – | 28 | 24 | 20 | 16 | 13 | 10 | 7 |
| 62 | 40 | – | 33 | 28 | 23 | 20 | 17 | 13 | 9 |
| 63 | 40 | – | 29 | 25 | 21 | 18 | 15 | 12 | 9 |
Syllabus thresholds by route (weighted marks)
June 2026
| Route | Max | A* | A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|---|---|---|
| 11+31+51 | 200 | – | – | – | 111 | 95 | 80 | 65 | 50 |
| 11+31+61 | 200 | – | – | – | 112 | 96 | 81 | 67 | 53 |
| 12+32+52 | 200 | – | – | – | 115 | 101 | 88 | 75 | 62 |
| 12+32+62 | 200 | – | – | – | 116 | 102 | 88 | 75 | 62 |
| 13+33+53 | 200 | – | – | – | 104 | 91 | 78 | 63 | 48 |
| 13+33+63 | 200 | – | – | – | 105 | 91 | 77 | 62 | 47 |
| 17+31+51 | 200 | – | – | – | 111 | 95 | 80 | 65 | 50 |
| 17+31+61 | 200 | – | – | – | 112 | 96 | 81 | 67 | 53 |
| 21+41+51 | 200 | 165 | 137 | 109 | 82 | 72 | 63 | 53 | 43 |
| 21+41+61 | 200 | 166 | 138 | 110 | 83 | 73 | 64 | 55 | 46 |
| 22+42+52 | 200 | 167 | 141 | 115 | 89 | 76 | 64 | 53 | 42 |
| 22+42+62 | 200 | 167 | 141 | 115 | 90 | 77 | 64 | 53 | 42 |
| 23+43+53 | 200 | 171 | 146 | 121 | 96 | 85 | 74 | 63 | 52 |
| 23+43+63 | 200 | 169 | 145 | 121 | 97 | 85 | 73 | 62 | 51 |
| 27+41+51 | 200 | 165 | 137 | 109 | 82 | 72 | 63 | 53 | 43 |
| 27+41+61 | 200 | 166 | 138 | 110 | 83 | 73 | 64 | 55 | 46 |
| 50 | 90 | 82 | 75 | 66 | 57 | 49 | 41 | 33 | 25 |
November 2025
| Route | Max | A* | A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|---|---|---|
| BX20021+41 | 51 | 162 | 139 | 116 | 94 | 81 | 69 | 57 | 45 |
| BY20022+42 | 52 | 163 | 138 | 113 | 89 | 76 | 63 | 52 | 41 |
| BZ20023+43 | 53 | 164 | 140 | 116 | 92 | 79 | 66 | 55 | 44 |
| CX20021+41 | 61 | 163 | 140 | 117 | 95 | 82 | 70 | 58 | 46 |
| CY20022+42 | 62 | 164 | 139 | 114 | 89 | 76 | 63 | 52 | 41 |
| CZ20023+43 | 63 | 163 | 139 | 115 | 92 | 79 | 66 | 55 | 44 |
| FX20011+31 | 51 | – | – | – | 111 | 96 | 81 | 65 | 49 |
| FY20012+32 | 52 | – | – | – | 114 | 99 | 85 | 72 | 59 |
| FZ20013+33 | 53 | – | – | – | 114 | 98 | 83 | 68 | 53 |
| GX20011+31 | 61 | – | – | – | 112 | 97 | 82 | 66 | 50 |
| GY20012+32 | 62 | – | – | – | 114 | 99 | 85 | 72 | 59 |
| GZ20013+33 | 63 | – | – | – | 114 | 98 | 83 | 68 | 53 |
June 2025
| Route | Max | A* | A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|---|---|---|
| BX20021+41 | 51 | 159 | 131 | 103 | 75 | 65 | 56 | 47 | 38 |
| BY20022+42 | 52 | 173 | 148 | 123 | 99 | 85 | 71 | 58 | 45 |
| BZ20023+43 | 53 | 156 | 131 | 106 | 81 | 69 | 58 | 48 | 38 |
| CX20021+41 | 61 | 160 | 132 | 104 | 76 | 66 | 56 | 48 | 40 |
| CY20022+42 | 62 | 174 | 149 | 124 | 99 | 85 | 71 | 58 | 45 |
| CZ20023+43 | 63 | 157 | 132 | 107 | 82 | 70 | 59 | 49 | 39 |
| FX20011+31 | 51 | – | – | – | 117 | 101 | 85 | 69 | 53 |
| FY20012+32 | 52 | – | – | – | 113 | 99 | 85 | 72 | 59 |
| FZ20013+33 | 53 | – | – | – | 112 | 99 | 87 | 75 | 63 |
| GX20011+31 | 61 | – | – | – | 118 | 101 | 85 | 70 | 55 |
| GY20012+32 | 62 | – | – | – | 113 | 99 | 85 | 72 | 59 |
| GZ20013+33 | 63 | – | – | – | 113 | 100 | 88 | 76 | 64 |
November 2024
| Route | Max | A* | A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|---|---|---|
| BX20021+41 | 51 | 163 | 140 | 117 | 95 | 81 | 68 | 56 | 44 |
| BY20022+42 | 52 | 170 | 147 | 124 | 101 | 87 | 73 | 60 | 47 |
| BZ20023+43 | 53 | 152 | 131 | 110 | 89 | 78 | 67 | 55 | 43 |
| CX20021+41 | 61 | 164 | 141 | 118 | 96 | 82 | 68 | 56 | 44 |
| CY20022+42 | 62 | 172 | 148 | 124 | 101 | 87 | 73 | 60 | 47 |
| CZ20023+43 | 63 | 153 | 132 | 111 | 90 | 78 | 67 | 55 | 43 |
| FX20011+31 | 51 | – | – | – | 116 | 101 | 87 | 73 | 59 |
| FY20012+32 | 52 | – | – | – | 120 | 103 | 86 | 69 | 52 |
| FZ20013+33 | 53 | – | – | – | 109 | 96 | 83 | 68 | 53 |
| GX20011+31 | 61 | – | – | – | 117 | 102 | 87 | 73 | 59 |
| GY20012+32 | 62 | – | – | – | 120 | 103 | 86 | 69 | 52 |
| GZ20013+33 | 63 | – | – | – | 110 | 96 | 83 | 68 | 53 |
Source: official Cambridge International grade-boundary documents — every file sha256-recorded in the syllabai-resources GradeBoundaries lane. A boundary is the minimum mark for the grade.