International A levelPearson EdexcelYBI11

Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries for 20 series, June 2019 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 Pearson Edexcel's own document, which is linked underneath.

Pearson Edexcel International A level Biology past papers and mark schemes Specification All Edexcel grade boundaries Everything for Biology

June 2026 Pearson Edexcel International A level Biology grade boundaries

Newest

Pearson Edexcel International A level Biology grade boundaries, June 2026: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, June 2026
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	5872.5%	5163.8%	4556.3%	3948.8%	3341.3%
Unit 1A: Molecules, Diet, Transport and HealthWBI11	80	not available	5872.5%	5163.8%	4556.3%	3948.8%	3341.3%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5872.5%	5163.8%	4455%	3746.3%	3138.8%
Unit 2A: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5771.3%	5062.5%	4353.8%	3746.3%	3138.8%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3672%	3162%	2652%	2142%	1734%
Unit 3A: Practical Skills in Biology IWBI13	50	not available	3876%	3366%	2856%	2448%	2040%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	6268.9%	5662.2%	5055.6%	4448.9%	3842.2%	3235.6%
Unit 4A: Energy, Environment, Microbiology and ImmunityWBI14	90	6370%	5763.3%	5156.7%	4550%	3943.3%	3336.7%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	7280%	6471.1%	5662.2%	4853.3%	4044.4%	3336.7%
Unit 5A: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	7280%	6471.1%	5662.2%	4853.3%	4145.6%	3437.8%
Unit 6: Practical Skills in Biology IIWBI16	50	4590%	4182%	3672%	3162%	2652%	2244%
Unit 6A: Practical Skills in Biology IIWBI16	50	4590%	4080%	3570%	3060%	2550%	2142%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level June 2026 (opens qualifications.pearson.com 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.

Which boundaries

January 2026 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, January 2026: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, January 2026
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	5467.5%	4860%	4252.5%	3645%	3037.5%
Unit 1A: Molecules, Diet, Transport and HealthWBI11	80	not available	5467.5%	4860%	4252.5%	3645%	3037.5%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5771.3%	5062.5%	4353.8%	3746.3%	3138.8%
Unit 2A: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5771.3%	5062.5%	4353.8%	3746.3%	3138.8%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3876%	3366%	2856%	2346%	1938%
Unit 3A: Practical Skills in Biology IWBI13	50	not available	3876%	3366%	2856%	2346%	1938%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	6167.8%	5561.1%	4954.4%	4448.9%	3943.3%	3437.8%
Unit 4A: Energy, Environment, Microbiology and ImmunityWBI14	90	6167.8%	5561.1%	4954.4%	4448.9%	3943.3%	3437.8%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	6774.4%	6066.7%	5358.9%	4752.2%	4145.6%	3538.9%
Unit 6: Practical Skills in Biology IIWBI16	50	4386%	3876%	3366%	2958%	2550%	2142%
Unit 6A: Practical Skills in Biology IIWBI16	50	4386%	3876%	3366%	2958%	2550%	2142%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level January 2026 (opens qualifications.pearson.com 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.

Which boundaries

October 2025 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, October 2025: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, October 2025
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	5366.3%	4758.8%	4151.3%	3543.8%	2936.3%
Unit 1A: Molecules, Diet, Transport and HealthWBI11	80	not available	5366.3%	4758.8%	4151.3%	3543.8%	2936.3%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5568.8%	4860%	4151.3%	3543.8%	2936.3%
Unit 2A: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5568.8%	4860%	4151.3%	3543.8%	2936.3%
Unit 3: Practical Skills in Biology IWBI13	50	not available	4080%	3570%	3060%	2550%	2142%
Unit 3A: Practical Skills in Biology IWBI13	50	not available	4080%	3570%	3060%	2550%	2142%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	6066.7%	5460%	4853.3%	4347.8%	3842.2%	3336.7%
Unit 4A: Energy, Environment, Microbiology and ImmunityWBI14	90	6066.7%	5460%	4853.3%	4347.8%	3842.2%	3336.7%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	6774.4%	6066.7%	5358.9%	4752.2%	4145.6%	3538.9%
Unit 5A: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	6774.4%	6066.7%	5358.9%	4752.2%	4145.6%	3538.9%
Unit 6: Practical Skills in Biology IIWBI16	50	4590%	4080%	3570%	3162%	2754%	2346%
Unit 6A: Practical Skills in Biology IIWBI16	50	4590%	4080%	3570%	3162%	2754%	2346%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level October 2025 (opens qualifications.pearson.com 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.

Which boundaries

June 2025 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, June 2025: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, June 2025
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	5467.5%	4860%	4252.5%	3645%	3037.5%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5771.3%	5062.5%	4353.8%	3746.3%	3138.8%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3876%	3366%	2856%	2346%	1938%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	6167.8%	5561.1%	4954.4%	4448.9%	3943.3%	3437.8%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	6774.4%	6066.7%	5358.9%	4752.2%	4145.6%	3538.9%
Unit 6: Practical Skills in Biology IIWBI16	50	4386%	3876%	3366%	2958%	2550%	2142%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level June 2025 (opens qualifications.pearson.com 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.

Which boundaries

June 2025 past papers and mark schemes

January 2025 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, January 2025: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, January 2025
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	4961.3%	4353.8%	3746.3%	3138.8%	2531.3%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5467.5%	4758.8%	4050%	3341.3%	2733.8%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3366%	2958%	2550%	2244%	1938%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	5965.6%	5358.9%	4752.2%	4145.6%	3538.9%	3033.3%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	6471.1%	5763.3%	5055.6%	4347.8%	3640%	3033.3%
Unit 6: Practical Skills in Biology IIWBI16	50	4284%	3876%	3468%	3060%	2652%	2244%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level January 2025 (opens qualifications.pearson.com 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.

Which boundaries

January 2025 past papers and mark schemes

October 2024 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, October 2024: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, October 2024
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	4657.5%	4050%	3543.8%	3037.5%	2531.3%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5366.3%	4657.5%	3948.8%	3240%	2632.5%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3366%	2958%	2550%	2244%	1938%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	5662.2%	5055.6%	4448.9%	3842.2%	3336.7%	2831.1%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	6370%	5662.2%	4954.4%	4246.7%	3538.9%	2932.2%
Unit 6: Practical Skills in Biology IIWBI16	50	4284%	3876%	3468%	3060%	2652%	2244%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level October 2024 (opens qualifications.pearson.com 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.

Which boundaries

October 2024 past papers and mark schemes

June 2024 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, June 2024: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, June 2024
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	4961.3%	4455%	3948.8%	3543.8%	3138.8%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5872.5%	5467.5%	5062.5%	4657.5%	4252.5%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3366%	2958%	2550%	2142%	1836%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	5763.3%	5358.9%	4954.4%	4550%	4145.6%	3842.2%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	6167.8%	5763.3%	5358.9%	4954.4%	4651.1%	4347.8%
Unit 6: Practical Skills in Biology IIWBI16	50	4284%	3876%	3468%	3060%	2652%	2244%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level June 2024 (opens qualifications.pearson.com 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.

Which boundaries

June 2024 past papers and mark schemes

January 2024 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, January 2024: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, January 2024
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	4961.3%	4353.8%	3847.5%	3341.3%	2835%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5568.8%	5163.8%	4758.8%	4353.8%	3948.8%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3774%	3264%	2754%	2346%	1938%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	5055.6%	4752.2%	4448.9%	4145.6%	3943.3%	3741.1%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	6167.8%	5662.2%	5156.7%	4651.1%	4246.7%	3842.2%
Unit 6: Practical Skills in Biology IIWBI16	50	4692%	4386%	3876%	3366%	2856%	2346%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level January 2024 (opens qualifications.pearson.com 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.

Which boundaries

January 2024 past papers and mark schemes

October 2023 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, October 2023: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, October 2023
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	4758.8%	4151.3%	3543.8%	3037.5%	2531.3%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5467.5%	4961.3%	4556.3%	4151.3%	3746.3%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3774%	3264%	2754%	2346%	1938%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	4752.2%	4550%	4347.8%	4145.6%	3943.3%	3741.1%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	5965.6%	5561.1%	5156.7%	4752.2%	4347.8%	3943.3%
Unit 6: Practical Skills in Biology IIWBI16	50	4692%	4386%	3876%	3366%	2856%	2346%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level October 2023 (opens qualifications.pearson.com 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.

Which boundaries

October 2023 past papers and mark schemes

June 2023 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, June 2023: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, June 2023
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	4860%	4252.5%	3746.3%	3240%	2733.8%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5568.8%	5163.8%	4758.8%	4353.8%	3948.8%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3978%	3468%	2958%	2448%	2040%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	4752.2%	4550%	4347.8%	4145.6%	3943.3%	3741.1%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	5965.6%	5561.1%	5156.7%	4752.2%	4347.8%	3943.3%
Unit 6: Practical Skills in Biology IIWBI16	50	4692%	4386%	3876%	3366%	2856%	2346%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level June 2023 (opens qualifications.pearson.com 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.

Which boundaries

June 2023 past papers and mark schemes

January 2023 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, January 2023: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, January 2023
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	3746.3%	3240%	2733.8%	2328.8%	1923.8%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	4556.3%	4151.3%	3746.3%	3341.3%	2936.3%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3162%	2652%	2244%	1836%	1428%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	4550%	3943.3%	3640%	3336.7%	3033.3%	2831.1%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	4651.1%	3943.3%	3538.9%	3134.4%	2730%	2325.6%
Unit 6: Practical Skills in Biology IIWBI16	50	3672%	3162%	2652%	2142%	1632%	1122%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level January 2023 (opens qualifications.pearson.com 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.

Which boundaries

January 2023 past papers and mark schemes

October 2022 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, October 2022: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, October 2022
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	3746.3%	3240%	2733.8%	2328.8%	1923.8%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	4556.3%	4151.3%	3746.3%	3341.3%	2936.3%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3162%	2652%	2244%	1836%	1428%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	4550%	3943.3%	3640%	3336.7%	3033.3%	2831.1%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	4651.1%	3943.3%	3538.9%	3134.4%	2730%	2325.6%
Unit 6: Practical Skills in Biology IIWBI16	50	3672%	3162%	2652%	2142%	1632%	1224%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level October 2022 (opens qualifications.pearson.com 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.

Which boundaries

October 2022 past papers and mark schemes

June 2022 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, June 2022: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, June 2022
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	3746.3%	3240%	2733.8%	2328.8%	1923.8%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	4556.3%	4151.3%	3746.3%	3341.3%	2936.3%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3162%	2652%	2244%	1836%	1428%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	4550%	3943.3%	3640%	3336.7%	3033.3%	2831.1%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	4651.1%	3943.3%	3538.9%	3134.4%	2730%	2325.6%
Unit 6: Practical Skills in Biology IIWBI16	50	3672%	3162%	2652%	2142%	1632%	1122%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level June 2022 (opens qualifications.pearson.com 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.

Which boundaries

June 2022 past papers and mark schemes

January 2022 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, January 2022: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, January 2022
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	3746.3%	3138.8%	2632.5%	2126.3%	1620%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	3847.5%	3240%	2632.5%	2126.3%	1620%
Unit 3: Practical Skills in Biology IWBI13	50	not available	2958%	2550%	2142%	1836%	1530%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	5460%	4550%	3741.1%	2932.2%	2224.4%	1516.7%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	5460%	4550%	3741.1%	2932.2%	2123.3%	1314.4%
Unit 6: Practical Skills in Biology IIWBI16	50	4386%	4080%	3366%	2652%	1938%	1326%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level January 2022 (opens qualifications.pearson.com 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.

Which boundaries

January 2022 past papers and mark schemes

October 2021 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, October 2021: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, October 2021
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	3746.3%	3138.8%	2632.5%	2126.3%	1620%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	3847.5%	3240%	2632.5%	2126.3%	1620%
Unit 3: Practical Skills in Biology IWBI13	50	not available	2754%	2346%	1938%	1632%	1326%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	5460%	4550%	3741.1%	2932.2%	2123.3%	1415.6%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	5055.6%	4145.6%	3437.8%	2730%	2022.2%	1314.4%
Unit 6: Practical Skills in Biology IIWBI16	50	4284%	3978%	3264%	2550%	1938%	1326%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level October 2021 (opens qualifications.pearson.com 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.

Which boundaries

October 2021 past papers and mark schemes

January 2021 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, January 2021: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, January 2021
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	4050%	3341.3%	2632.5%	1923.8%	1316.3%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	4353.8%	3645%	2936.3%	2227.5%	1620%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3366%	2856%	2346%	1938%	1530%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	5864.4%	4954.4%	4044.4%	3134.4%	2224.4%	1314.4%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	5561.1%	4752.2%	3842.2%	3033.3%	2224.4%	1415.6%
Unit 6: Practical Skills in Biology IIWBI16	50	4386%	3876%	3162%	2448%	1734%	1122%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level January 2021 (opens qualifications.pearson.com 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.

Which boundaries

January 2021 past papers and mark schemes

October 2020 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, October 2020: the qualification as a whole
Qualification or route	Max mark	Grade: lowest mark, and % of max mark
Qualification or route	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International A level	600	not available	48080%	42070%	36060%	30050%	24040%
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, October 2020
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	4151.3%	3442.5%	2733.8%	2126.3%	1518.8%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	4353.8%	3645%	2936.3%	2227.5%	1620%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3162%	2652%	2142%	1734%	1326%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	5763.3%	4853.3%	3943.3%	3033.3%	2123.3%	1314.4%
Unit 5: Respiration, Internal Environment, Coordination and Gene TechnologyWBI15	90	5460%	4651.1%	3842.2%	3033.3%	2224.4%	1415.6%
Unit 6: Practical Skills in Biology IIWBI16	50	4488%	3978%	3162%	2448%	1734%	1020%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level October 2020 (opens qualifications.pearson.com 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.

Which boundaries

October 2020 past papers and mark schemes

January 2020 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, January 2020: the qualification as a whole
Qualification	Max mark	Grade: lowest mark, and % of max mark
Qualification	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, January 2020
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	4860%	4353.8%	3847.5%	3341.3%	2936.3%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	4758.8%	4353.8%	3948.8%	3543.8%	3138.8%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3774%	3366%	2958%	2550%	2244%
Unit 4: Energy, Environment, Microbiology and ImmunityWBI14	90	5965.6%	5561.1%	5156.7%	4752.2%	4347.8%	4044.4%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.
A2 units are graded A to E: the A* figures for them are the theoretical boundaries Pearson publishes. Pearson publishes no A* boundary for the overall grade.

Source: Pearson Edexcel grade boundaries, International A level January 2020 (opens qualifications.pearson.com 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.

January 2020 past papers and mark schemes

October 2019 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, October 2019: the qualification as a whole
Qualification	Max mark	Grade: lowest mark, and % of max mark
Qualification	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, October 2019
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	5062.5%	4657.5%	4252.5%	3948.8%	3645%
Unit 2: Cells, Development, Biodiversity and ConservationWBI12	80	not available	5265%	4860%	4455%	4151.3%	3847.5%
Unit 3: Practical Skills in Biology IWBI13	50	not available	3774%	3366%	2958%	2550%	2244%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.

Source: Pearson Edexcel grade boundaries, International A level October 2019 (opens qualifications.pearson.com 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.

October 2019 past papers and mark schemes

June 2019 Pearson Edexcel International A level Biology grade boundaries

Pearson Edexcel International A level Biology grade boundaries, June 2019: the qualification as a whole
Qualification	Max mark	Grade: lowest mark, and % of max mark
Qualification	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
International AS level	300	not available	24080%	21070%	18060%	15050%	12040%

Pearson Edexcel International A level Biology unit boundaries, June 2019
Unit	Max mark	Grade: lowest mark, and % of max mark
Unit	Max mark	Grade A*	Grade A	Grade B	Grade C	Grade D	Grade E
Unit 1: Molecules, Diet, Transport and HealthWBI11	80	not available	4758.8%	4353.8%	3948.8%	3543.8%	3138.8%
Cells, Development, Biodiversity and ConservationWBI12	80	not available	5062.5%	4657.5%	4252.5%	3948.8%	3645%
Practical Skills in Biology IWBI13	50	not available	3672%	3264%	2856%	2550%	2244%

Unit boundaries are raw marks. Each unit mark is converted to the uniform mark scale (UMS), and the International AS and A level grades are decided by the UMS totals in the overall rows.

Source: Pearson Edexcel grade boundaries, International A level June 2019 (opens qualifications.pearson.com 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 past papers and mark schemes

Common questions

What were the Biology grade boundaries in June 2026?

In June 2026, an A needed 480 out of 600 uniform marks and an E needed 240 on International A level. On International AS level, an A needed 240 out of 300 uniform marks and an E needed 120. The full table, with the boundaries for each paper, is at the top of this page.

Where do these Edexcel International A level Biology grade boundaries come from?

Every number is copied from Pearson Edexcel'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?

Edexcel 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 Edexcel 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.