Grade boundaries

Edexcel International GCSE (9–1) Biology 4BI1 grade boundaries

The newest summer series is shown first. Type a mark to see its grade, or choose another tier, series or paper.

Level

Subject

Board

Course

Boundaries

Whole subject or paper

Mark

Out of

Type a mark to see its grade.

The boundaries

June 2026 · whole subject

Grade	Needs
9	146 of 180
8	131 of 180
7	117 of 180
6	104 of 180
5	92 of 180
4	80 of 180
3	64 of 180
2	49 of 180
1	34 of 180

Every course·Mock grade calculator

Marks for each grade in June 2026

In total (1B 2B)

142 out of 180 on Edexcel 4BI1 (1B 2B) in total was a grade 9 in June 2026.
127 out of 180 on Edexcel 4BI1 (1B 2B) in total was a grade 8 in June 2026.
112 out of 180 on Edexcel 4BI1 (1B 2B) in total was a grade 7 in June 2026.
97 out of 180 on Edexcel 4BI1 (1B 2B) in total was a grade 6 in June 2026.
82 out of 180 on Edexcel 4BI1 (1B 2B) in total was a grade 5 in June 2026.
67 out of 180 on Edexcel 4BI1 (1B 2B) in total was a grade 4 in June 2026.
55 out of 180 on Edexcel 4BI1 (1B 2B) in total was a grade 3 in June 2026.
43 out of 180 on Edexcel 4BI1 (1B 2B) in total was a grade 2 in June 2026.
32 out of 180 on Edexcel 4BI1 (1B 2B) in total was a grade 1 in June 2026.

In total (1BR 2BR)

146 out of 180 on Edexcel 4BI1 (1BR 2BR) in total was a grade 9 in June 2026.
131 out of 180 on Edexcel 4BI1 (1BR 2BR) in total was a grade 8 in June 2026.
117 out of 180 on Edexcel 4BI1 (1BR 2BR) in total was a grade 7 in June 2026.
104 out of 180 on Edexcel 4BI1 (1BR 2BR) in total was a grade 6 in June 2026.
92 out of 180 on Edexcel 4BI1 (1BR 2BR) in total was a grade 5 in June 2026.
80 out of 180 on Edexcel 4BI1 (1BR 2BR) in total was a grade 4 in June 2026.
64 out of 180 on Edexcel 4BI1 (1BR 2BR) in total was a grade 3 in June 2026.
49 out of 180 on Edexcel 4BI1 (1BR 2BR) in total was a grade 2 in June 2026.
34 out of 180 on Edexcel 4BI1 (1BR 2BR) in total was a grade 1 in June 2026.

Every paper in June 2026

Every series

15 series, newest first. Each mark is the least that reaches the grade, out of the total under the column’s name.

June 2026

From Edexcel’s grade boundaries for June 2026: the board’s document.

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	142	146	89	92	53	54
8	127	131	80	82	46	49
7	112	117	72	73	40	44
6	97	104	63	65	33	39
5	82	92	55	57	26	34
4	67	80	47	50	20	30
3	55	64	38	40	17	24
2	43	49	29	30	14	18
1	32	34	21	21	11	13

November 2025

From Edexcel’s grade boundaries for November 2025: the board’s document.

Grade	Whole subjectout of 180	4BI1/1Bout of 110	4BI1/2Bout of 70
9	130	79	51
8	115	70	45
7	100	61	39
6	86	53	33
5	73	45	28
4	60	37	23
3	50	31	19
2	41	25	15
1	32	20	12

June 2025

From Edexcel’s grade boundaries for June 2025: the board’s document.

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	140	144	85	88	55	56
8	124	127	75	78	49	49
7	109	111	66	68	43	43
6	94	96	58	59	36	36
5	79	81	50	51	29	30
4	65	67	42	43	23	24
3	54	56	35	35	19	20
2	43	45	28	28	15	16
1	32	34	21	21	11	13

November 2024

From Edexcel’s grade boundaries for November 2024: the board’s document.

Grade	Whole subjectout of 180	4BI1/1Bout of 110	4BI1/2Bout of 70
9	141	87	54
8	126	78	48
7	111	69	42
6	96	60	36
5	82	52	30
4	68	44	24
3	56	36	19
2	44	29	15
1	33	22	11

June 2024

From Edexcel’s grade boundaries for June 2024: the board’s document.

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	141	141	87	87	54	54
8	126	126	78	79	47	47
7	111	111	70	71	41	40
6	96	97	61	62	35	34
5	82	83	53	54	29	28
4	68	69	45	46	23	23
3	56	57	37	38	18	19
2	44	46	30	30	14	15
1	33	35	23	23	10	12

November 2023

From Edexcel’s grade boundaries for November 2023: the board’s document.

Grade	Whole subjectout of 180	4BI1/1Bout of 110	4BI1/2Bout of 70
9	142	84	58
8	124	74	50
7	107	64	43
6	93	56	37
5	79	48	31
4	66	41	25
3	54	34	20
2	42	27	15
1	31	20	11

June 2023

From Edexcel’s grade boundaries for June 2023: the board’s document.

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	142	146	84	87	58	59
8	124	126	74	75	50	51
7	107	107	64	64	43	43
6	93	93	56	56	37	37
5	79	80	48	48	31	31
4	65	67	40	41	25	26
3	53	55	33	34	20	21
2	41	43	26	27	15	16
1	30	32	19	20	11	12

January 2023

From Edexcel’s grade boundaries for January 2023: the board’s document.

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	134	134	81	81	53	53
8	114	114	69	69	45	45
7	95	95	57	57	38	38
6	79	79	48	48	31	31
5	64	64	39	39	25	25
4	49	49	30	30	19	19
3	40	40	24	24	15	15
2	31	31	19	19	12	12
1	23	23	14	14	9	9

June 2022

From Edexcel’s grade boundaries for June 2022: the board’s document.

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	134	132	82	76	55	53
8	114	111	69	64	46	45
7	95	90	57	53	38	37
6	79	75	48	44	31	30
5	64	60	39	36	25	24
4	49	46	30	28	19	18
3	40	37	24	22	15	15
2	31	29	19	17	12	12
1	23	21	14	12	9	9

January 2022

From Edexcel’s grade boundaries for January 2022: the board’s document.

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	128	128	78	78	50	50
8	111	111	67	67	43	43
7	94	94	57	57	37	37
6	76	76	46	46	30	30
5	58	58	35	35	23	23
4	40	40	24	24	16	16
3	31	31	19	19	12	12
2	23	23	14	14	9	9
1	15	15	9	9	6	6

November 2021

From Edexcel’s grade boundaries for November 2021: the board’s document.

Grade	Whole subjectout of 180	4BI1/1Bout of 110	4BI1/2Bout of 70
9	128	78	50
8	111	67	43
7	94	57	37
6	76	46	30
5	58	35	23
4	40	24	16
3	31	19	12
2	23	14	9
1	15	9	6

January 2021

From Edexcel’s grade boundaries for January 2021: the board’s document.

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	129	129	81	79	48	50
8	109	110	68	67	40	43
7	89	91	56	55	33	36
6	70	74	44	45	26	29
5	51	58	32	35	19	23
4	33	42	21	25	12	17
3	28	35	18	21	10	14
2	23	28	15	17	8	11
1	18	22	12	13	6	9

November 2020

From Edexcel’s grade boundaries for November 2020: the board’s document.

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	129	129	81	79	48	50
8	109	110	68	67	40	43
7	89	91	56	55	33	36
6	70	74	44	45	26	29
5	51	58	32	35	19	23
4	33	42	21	25	12	17
3	28	35	18	21	10	14
2	23	28	15	17	8	11
1	18	22	12	13	6	9

January 2020

From Edexcel’s grade boundaries for January 2020: the board’s document.

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	136	134	88	89	47	47
8	120	119	78	79	41	41
7	104	105	68	69	36	36
6	90	94	59	61	31	32
5	77	83	50	54	27	28
4	64	72	41	47	23	25
3	52	60	33	38	19	22
2	41	48	25	29	15	19
1	30	37	18	21	12	16

June 2019

From Edexcel’s grade boundaries for June 2019: the board’s document.

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	134	134	85	80	51	52
8	119	118	75	71	45	46
7	105	102	66	62	39	40
6	94	91	59	55	34	36
5	83	80	52	48	30	32
4	72	70	46	42	26	28
3	61	59	39	35	22	23
2	50	48	32	28	18	19
1	39	37	25	22	14	15

Questions

Which series of Edexcel International GCSE (9–1) Biology 4BI1 grade boundaries are there?

15 series, from June 2019 to June 2026: June 2026, November 2025, June 2025, November 2024, June 2024, November 2023, June 2023, January 2023, June 2022, January 2022, November 2021, January 2021, November 2020, January 2020 and June 2019.

Biology at other boards

Other Edexcel International GCSE courses

A series, or the safe rule

A paper is graded against the boundaries of the series it was sat in. Choose that series and the grade is the one the board’s boundaries gave that sitting. Where a series published more than one set of boundaries for the whole subject, one for each combination of papers, each grade takes the highest of them, and the line under the grade says so.

The safe rule is for a mark with no series of its own, such as a mock. For each grade it takes the highest boundary in the board’s most recent summer series, up to three of them and leaving out 2020 to 2022, or the course’s main series where it has no summer one. A grade it gives would have been enough in each of them. The line under the grade names the series it counted.

In the app you log a paper in one line, or question by question where asterisk has its questions, and each grade comes from these same boundaries. Open the app.

Not here

CCEA, AS level, IB and AP: the app holds no grade boundaries for them, so they are not offered.

Where these numbers come from

Boards publish their grade boundaries after each series, and that is all this page holds: each grade’s boundary mark and what the subject or paper is out of, as the board printed them. The papers stay on the boards’ own sites; nothing here reproduces a question or a mark scheme.

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	142	146	89	92	53	54
8	127	131	80	82	46	49
7	112	117	72	73	40	44
6	97	104	63	65	33	39
5	82	92	55	57	26	34
4	67	80	47	50	20	30
3	55	64	38	40	17	24
2	43	49	29	30	14	18
1	32	34	21	21	11	13

Grade	Whole subjectout of 180	4BI1/1Bout of 110	4BI1/2Bout of 70
9	130	79	51
8	115	70	45
7	100	61	39
6	86	53	33
5	73	45	28
4	60	37	23
3	50	31	19
2	41	25	15
1	32	20	12

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	140	144	85	88	55	56
8	124	127	75	78	49	49
7	109	111	66	68	43	43
6	94	96	58	59	36	36
5	79	81	50	51	29	30
4	65	67	42	43	23	24
3	54	56	35	35	19	20
2	43	45	28	28	15	16
1	32	34	21	21	11	13

Grade	Whole subjectout of 180	4BI1/1Bout of 110	4BI1/2Bout of 70
9	141	87	54
8	126	78	48
7	111	69	42
6	96	60	36
5	82	52	30
4	68	44	24
3	56	36	19
2	44	29	15
1	33	22	11

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	141	141	87	87	54	54
8	126	126	78	79	47	47
7	111	111	70	71	41	40
6	96	97	61	62	35	34
5	82	83	53	54	29	28
4	68	69	45	46	23	23
3	56	57	37	38	18	19
2	44	46	30	30	14	15
1	33	35	23	23	10	12

Grade	Whole subjectout of 180	4BI1/1Bout of 110	4BI1/2Bout of 70
9	142	84	58
8	124	74	50
7	107	64	43
6	93	56	37
5	79	48	31
4	66	41	25
3	54	34	20
2	42	27	15
1	31	20	11

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	142	146	84	87	58	59
8	124	126	74	75	50	51
7	107	107	64	64	43	43
6	93	93	56	56	37	37
5	79	80	48	48	31	31
4	65	67	40	41	25	26
3	53	55	33	34	20	21
2	41	43	26	27	15	16
1	30	32	19	20	11	12

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	134	134	81	81	53	53
8	114	114	69	69	45	45
7	95	95	57	57	38	38
6	79	79	48	48	31	31
5	64	64	39	39	25	25
4	49	49	30	30	19	19
3	40	40	24	24	15	15
2	31	31	19	19	12	12
1	23	23	14	14	9	9

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	134	132	82	76	55	53
8	114	111	69	64	46	45
7	95	90	57	53	38	37
6	79	75	48	44	31	30
5	64	60	39	36	25	24
4	49	46	30	28	19	18
3	40	37	24	22	15	15
2	31	29	19	17	12	12
1	23	21	14	12	9	9

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	128	128	78	78	50	50
8	111	111	67	67	43	43
7	94	94	57	57	37	37
6	76	76	46	46	30	30
5	58	58	35	35	23	23
4	40	40	24	24	16	16
3	31	31	19	19	12	12
2	23	23	14	14	9	9
1	15	15	9	9	6	6

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	142	146	89	92	53	54
8	127	131	80	82	46	49
7	112	117	72	73	40	44
6	97	104	63	65	33	39
5	82	92	55	57	26	34
4	67	80	47	50	20	30
3	55	64	38	40	17	24
2	43	49	29	30	14	18
1	32	34	21	21	11	13

Grade	Whole subjectout of 180	4BI1/1Bout of 110	4BI1/2Bout of 70
9	130	79	51
8	115	70	45
7	100	61	39
6	86	53	33
5	73	45	28
4	60	37	23
3	50	31	19
2	41	25	15
1	32	20	12

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	140	144	85	88	55	56
8	124	127	75	78	49	49
7	109	111	66	68	43	43
6	94	96	58	59	36	36
5	79	81	50	51	29	30
4	65	67	42	43	23	24
3	54	56	35	35	19	20
2	43	45	28	28	15	16
1	32	34	21	21	11	13

Grade	Whole subjectout of 180	4BI1/1Bout of 110	4BI1/2Bout of 70
9	141	87	54
8	126	78	48
7	111	69	42
6	96	60	36
5	82	52	30
4	68	44	24
3	56	36	19
2	44	29	15
1	33	22	11

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	141	141	87	87	54	54
8	126	126	78	79	47	47
7	111	111	70	71	41	40
6	96	97	61	62	35	34
5	82	83	53	54	29	28
4	68	69	45	46	23	23
3	56	57	37	38	18	19
2	44	46	30	30	14	15
1	33	35	23	23	10	12

Grade	Whole subjectout of 180	4BI1/1Bout of 110	4BI1/2Bout of 70
9	142	84	58
8	124	74	50
7	107	64	43
6	93	56	37
5	79	48	31
4	66	41	25
3	54	34	20
2	42	27	15
1	31	20	11

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	142	146	84	87	58	59
8	124	126	74	75	50	51
7	107	107	64	64	43	43
6	93	93	56	56	37	37
5	79	80	48	48	31	31
4	65	67	40	41	25	26
3	53	55	33	34	20	21
2	41	43	26	27	15	16
1	30	32	19	20	11	12

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	134	134	81	81	53	53
8	114	114	69	69	45	45
7	95	95	57	57	38	38
6	79	79	48	48	31	31
5	64	64	39	39	25	25
4	49	49	30	30	19	19
3	40	40	24	24	15	15
2	31	31	19	19	12	12
1	23	23	14	14	9	9

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	134	132	82	76	55	53
8	114	111	69	64	46	45
7	95	90	57	53	38	37
6	79	75	48	44	31	30
5	64	60	39	36	25	24
4	49	46	30	28	19	18
3	40	37	24	22	15	15
2	31	29	19	17	12	12
1	23	21	14	12	9	9

Grade	Whole subject (1B 2B)out of 180	Whole subject (1BR 2BR)out of 180	4BI1/1Bout of 110	4BI1/1BRout of 110	4BI1/2Bout of 70	4BI1/2BRout of 70
9	128	128	78	78	50	50
8	111	111	67	67	43	43
7	94	94	57	57	37	37
6	76	76	46	46	30	30
5	58	58	35	35	23	23
4	40	40	24	24	16	16
3	31	31	19	19	12	12
2	23	23	14	14	9	9
1	15	15	9	9	6	6