Grade boundaries

Edexcel International GCSE (9–1) Biology (Modular) 4XBI1 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

Paper

Mark

Out of

Type a mark to see its grade.

The boundaries

June 2026 · 4WBI11

Grade	Needs
9	73 of 90
8	63 of 90
7	54 of 90
6	47 of 90
5	41 of 90
4	35 of 90
3	28 of 90
2	22 of 90
1	16 of 90

Every course·Mock grade calculator

Marks for each grade in June 2026

Paper 4WBI1/1

73 out of 90 on Edexcel 4XBI1 paper 4WBI1/1 was a grade 9 in June 2026.
63 out of 90 on Edexcel 4XBI1 paper 4WBI1/1 was a grade 8 in June 2026.
54 out of 90 on Edexcel 4XBI1 paper 4WBI1/1 was a grade 7 in June 2026.
47 out of 90 on Edexcel 4XBI1 paper 4WBI1/1 was a grade 6 in June 2026.
41 out of 90 on Edexcel 4XBI1 paper 4WBI1/1 was a grade 5 in June 2026.
35 out of 90 on Edexcel 4XBI1 paper 4WBI1/1 was a grade 4 in June 2026.
28 out of 90 on Edexcel 4XBI1 paper 4WBI1/1 was a grade 3 in June 2026.
22 out of 90 on Edexcel 4XBI1 paper 4WBI1/1 was a grade 2 in June 2026.
16 out of 90 on Edexcel 4XBI1 paper 4WBI1/1 was a grade 1 in June 2026.

Paper 4WBI1/1R

73 out of 90 on Edexcel 4XBI1 paper 4WBI1/1R was a grade 9 in June 2026.
65 out of 90 on Edexcel 4XBI1 paper 4WBI1/1R was a grade 8 in June 2026.
57 out of 90 on Edexcel 4XBI1 paper 4WBI1/1R was a grade 7 in June 2026.
49 out of 90 on Edexcel 4XBI1 paper 4WBI1/1R was a grade 6 in June 2026.
41 out of 90 on Edexcel 4XBI1 paper 4WBI1/1R was a grade 5 in June 2026.
34 out of 90 on Edexcel 4XBI1 paper 4WBI1/1R was a grade 4 in June 2026.
28 out of 90 on Edexcel 4XBI1 paper 4WBI1/1R was a grade 3 in June 2026.
22 out of 90 on Edexcel 4XBI1 paper 4WBI1/1R was a grade 2 in June 2026.
16 out of 90 on Edexcel 4XBI1 paper 4WBI1/1R was a grade 1 in June 2026.

Paper 4WBI2/2

62 out of 90 on Edexcel 4XBI1 paper 4WBI2/2 was a grade 9 in June 2026.
55 out of 90 on Edexcel 4XBI1 paper 4WBI2/2 was a grade 8 in June 2026.
48 out of 90 on Edexcel 4XBI1 paper 4WBI2/2 was a grade 7 in June 2026.
40 out of 90 on Edexcel 4XBI1 paper 4WBI2/2 was a grade 6 in June 2026.
33 out of 90 on Edexcel 4XBI1 paper 4WBI2/2 was a grade 5 in June 2026.
26 out of 90 on Edexcel 4XBI1 paper 4WBI2/2 was a grade 4 in June 2026.
22 out of 90 on Edexcel 4XBI1 paper 4WBI2/2 was a grade 3 in June 2026.
18 out of 90 on Edexcel 4XBI1 paper 4WBI2/2 was a grade 2 in June 2026.
14 out of 90 on Edexcel 4XBI1 paper 4WBI2/2 was a grade 1 in June 2026.

Paper 4WBI2/2R

73 out of 90 on Edexcel 4XBI1 paper 4WBI2/2R was a grade 9 in June 2026.
64 out of 90 on Edexcel 4XBI1 paper 4WBI2/2R was a grade 8 in June 2026.
55 out of 90 on Edexcel 4XBI1 paper 4WBI2/2R was a grade 7 in June 2026.
46 out of 90 on Edexcel 4XBI1 paper 4WBI2/2R was a grade 6 in June 2026.
38 out of 90 on Edexcel 4XBI1 paper 4WBI2/2R was a grade 5 in June 2026.
30 out of 90 on Edexcel 4XBI1 paper 4WBI2/2R was a grade 4 in June 2026.
25 out of 90 on Edexcel 4XBI1 paper 4WBI2/2R was a grade 3 in June 2026.
20 out of 90 on Edexcel 4XBI1 paper 4WBI2/2R was a grade 2 in June 2026.
15 out of 90 on Edexcel 4XBI1 paper 4WBI2/2R was a grade 1 in June 2026.

Every paper in June 2026

Every series

3 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	4WBI1/1out of 90	4WBI1/1Rout of 90	4WBI2/2out of 90	4WBI2/2Rout of 90
9	73	73	62	73
8	63	65	55	64
7	54	57	48	55
6	47	49	40	46
5	41	41	33	38
4	35	34	26	30
3	28	28	22	25
2	22	22	18	20
1	16	16	14	15

November 2025

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

Grade	4WBI1/1out of 90	4WBI2/2out of 90
9	65	65
8	57	57
7	50	50
6	43	43
5	36	36
4	30	30
3	25	25
2	20	20
1	16	16

June 2025

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

Grade	4WBI1/1out of 90	4WBI1/1Rout of 90	4WBI2/2out of 90	4WBI2/2Rout of 90
9	70	72	72	72
8	62	64	63	63
7	54	56	55	55
6	47	48	47	46
5	41	41	39	38
4	35	34	32	30
3	29	28	26	25
2	23	22	20	20
1	18	16	15	15

Questions

Which series of Edexcel International GCSE (9–1) Biology (Modular) 4XBI1 grade boundaries are there?

3 series, from June 2025 to June 2026: June 2026, November 2025 and June 2025.

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	4WBI1/1out of 90	4WBI1/1Rout of 90	4WBI2/2out of 90	4WBI2/2Rout of 90
9	73	73	62	73
8	63	65	55	64
7	54	57	48	55
6	47	49	40	46
5	41	41	33	38
4	35	34	26	30
3	28	28	22	25
2	22	22	18	20
1	16	16	14	15

Grade	4WBI1/1out of 90	4WBI1/1Rout of 90	4WBI2/2out of 90	4WBI2/2Rout of 90
9	70	72	72	72
8	62	64	63	63
7	54	56	55	55
6	47	48	47	46
5	41	41	39	38
4	35	34	32	30
3	29	28	26	25
2	23	22	20	20
1	18	16	15	15

Grade	4WBI1/1out of 90	4WBI1/1Rout of 90	4WBI2/2out of 90	4WBI2/2Rout of 90
9	73	73	62	73
8	63	65	55	64
7	54	57	48	55
6	47	49	40	46
5	41	41	33	38
4	35	34	26	30
3	28	28	22	25
2	22	22	18	20
1	16	16	14	15

Grade	4WBI1/1out of 90	4WBI1/1Rout of 90	4WBI2/2out of 90	4WBI2/2Rout of 90
9	70	72	72	72
8	62	64	63	63
7	54	56	55	55
6	47	48	47	46
5	41	41	39	38
4	35	34	32	30
3	29	28	26	25
2	23	22	20	20
1	18	16	15	15