Grade boundaries

Edexcel International AS and A level Biology XBI11/YBI11 grade boundaries June 2026

The least raw mark that reached each grade in June 2026, as Edexcel printed it, for the whole subject and each paper.

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

Grade	WBI11/1out of 80	WBI11/1Aout of 80	WBI12/2out of 80	WBI12/2Aout of 80	WBI13/3out of 50	WBI13/3Aout of 50	WBI14/4out of 90	WBI14/4Aout of 90	WBI15/5out of 90	WBI15/5Aout of 90	WBI16/6out of 50	WBI16/6Aout of 50
A*	–	–	–	–	–	–	62	63	72	72	45	45
A	58	58	58	57	36	38	56	57	64	64	41	40
B	51	51	51	50	31	33	50	51	56	56	36	35
C	45	45	44	43	26	28	44	45	48	48	31	30
D	39	39	37	37	21	24	38	39	40	41	26	25
E	33	33	31	31	17	20	32	33	33	34	22	21

Marks for each grade

Paper WBI11/1

58 out of 80 on Edexcel XBI11/YBI11 paper WBI11/1 was a grade A in June 2026.
51 out of 80 on Edexcel XBI11/YBI11 paper WBI11/1 was a grade B in June 2026.
45 out of 80 on Edexcel XBI11/YBI11 paper WBI11/1 was a grade C in June 2026.
39 out of 80 on Edexcel XBI11/YBI11 paper WBI11/1 was a grade D in June 2026.
33 out of 80 on Edexcel XBI11/YBI11 paper WBI11/1 was a grade E in June 2026.

Paper WBI11/1A

58 out of 80 on Edexcel XBI11/YBI11 paper WBI11/1A was a grade A in June 2026.
51 out of 80 on Edexcel XBI11/YBI11 paper WBI11/1A was a grade B in June 2026.
45 out of 80 on Edexcel XBI11/YBI11 paper WBI11/1A was a grade C in June 2026.
39 out of 80 on Edexcel XBI11/YBI11 paper WBI11/1A was a grade D in June 2026.
33 out of 80 on Edexcel XBI11/YBI11 paper WBI11/1A was a grade E in June 2026.

Paper WBI12/2

58 out of 80 on Edexcel XBI11/YBI11 paper WBI12/2 was a grade A in June 2026.
51 out of 80 on Edexcel XBI11/YBI11 paper WBI12/2 was a grade B in June 2026.
44 out of 80 on Edexcel XBI11/YBI11 paper WBI12/2 was a grade C in June 2026.
37 out of 80 on Edexcel XBI11/YBI11 paper WBI12/2 was a grade D in June 2026.
31 out of 80 on Edexcel XBI11/YBI11 paper WBI12/2 was a grade E in June 2026.

Paper WBI12/2A

57 out of 80 on Edexcel XBI11/YBI11 paper WBI12/2A was a grade A in June 2026.
50 out of 80 on Edexcel XBI11/YBI11 paper WBI12/2A was a grade B in June 2026.
43 out of 80 on Edexcel XBI11/YBI11 paper WBI12/2A was a grade C in June 2026.
37 out of 80 on Edexcel XBI11/YBI11 paper WBI12/2A was a grade D in June 2026.
31 out of 80 on Edexcel XBI11/YBI11 paper WBI12/2A was a grade E in June 2026.

Paper WBI13/3

36 out of 50 on Edexcel XBI11/YBI11 paper WBI13/3 was a grade A in June 2026.
31 out of 50 on Edexcel XBI11/YBI11 paper WBI13/3 was a grade B in June 2026.
26 out of 50 on Edexcel XBI11/YBI11 paper WBI13/3 was a grade C in June 2026.
21 out of 50 on Edexcel XBI11/YBI11 paper WBI13/3 was a grade D in June 2026.
17 out of 50 on Edexcel XBI11/YBI11 paper WBI13/3 was a grade E in June 2026.

Paper WBI13/3A

38 out of 50 on Edexcel XBI11/YBI11 paper WBI13/3A was a grade A in June 2026.
33 out of 50 on Edexcel XBI11/YBI11 paper WBI13/3A was a grade B in June 2026.
28 out of 50 on Edexcel XBI11/YBI11 paper WBI13/3A was a grade C in June 2026.
24 out of 50 on Edexcel XBI11/YBI11 paper WBI13/3A was a grade D in June 2026.
20 out of 50 on Edexcel XBI11/YBI11 paper WBI13/3A was a grade E in June 2026.

Paper WBI14/4

62 out of 90 on Edexcel XBI11/YBI11 paper WBI14/4 was a grade A* in June 2026.
56 out of 90 on Edexcel XBI11/YBI11 paper WBI14/4 was a grade A in June 2026.
50 out of 90 on Edexcel XBI11/YBI11 paper WBI14/4 was a grade B in June 2026.
44 out of 90 on Edexcel XBI11/YBI11 paper WBI14/4 was a grade C in June 2026.
38 out of 90 on Edexcel XBI11/YBI11 paper WBI14/4 was a grade D in June 2026.
32 out of 90 on Edexcel XBI11/YBI11 paper WBI14/4 was a grade E in June 2026.

Paper WBI14/4A

63 out of 90 on Edexcel XBI11/YBI11 paper WBI14/4A was a grade A* in June 2026.
57 out of 90 on Edexcel XBI11/YBI11 paper WBI14/4A was a grade A in June 2026.
51 out of 90 on Edexcel XBI11/YBI11 paper WBI14/4A was a grade B in June 2026.
45 out of 90 on Edexcel XBI11/YBI11 paper WBI14/4A was a grade C in June 2026.
39 out of 90 on Edexcel XBI11/YBI11 paper WBI14/4A was a grade D in June 2026.
33 out of 90 on Edexcel XBI11/YBI11 paper WBI14/4A was a grade E in June 2026.

Paper WBI15/5

72 out of 90 on Edexcel XBI11/YBI11 paper WBI15/5 was a grade A* in June 2026.
64 out of 90 on Edexcel XBI11/YBI11 paper WBI15/5 was a grade A in June 2026.
56 out of 90 on Edexcel XBI11/YBI11 paper WBI15/5 was a grade B in June 2026.
48 out of 90 on Edexcel XBI11/YBI11 paper WBI15/5 was a grade C in June 2026.
40 out of 90 on Edexcel XBI11/YBI11 paper WBI15/5 was a grade D in June 2026.
33 out of 90 on Edexcel XBI11/YBI11 paper WBI15/5 was a grade E in June 2026.

Paper WBI15/5A

72 out of 90 on Edexcel XBI11/YBI11 paper WBI15/5A was a grade A* in June 2026.
64 out of 90 on Edexcel XBI11/YBI11 paper WBI15/5A was a grade A in June 2026.
56 out of 90 on Edexcel XBI11/YBI11 paper WBI15/5A was a grade B in June 2026.
48 out of 90 on Edexcel XBI11/YBI11 paper WBI15/5A was a grade C in June 2026.
41 out of 90 on Edexcel XBI11/YBI11 paper WBI15/5A was a grade D in June 2026.
34 out of 90 on Edexcel XBI11/YBI11 paper WBI15/5A was a grade E in June 2026.

Paper WBI16/6

45 out of 50 on Edexcel XBI11/YBI11 paper WBI16/6 was a grade A* in June 2026.
41 out of 50 on Edexcel XBI11/YBI11 paper WBI16/6 was a grade A in June 2026.
36 out of 50 on Edexcel XBI11/YBI11 paper WBI16/6 was a grade B in June 2026.
31 out of 50 on Edexcel XBI11/YBI11 paper WBI16/6 was a grade C in June 2026.
26 out of 50 on Edexcel XBI11/YBI11 paper WBI16/6 was a grade D in June 2026.
22 out of 50 on Edexcel XBI11/YBI11 paper WBI16/6 was a grade E in June 2026.

Paper WBI16/6A

45 out of 50 on Edexcel XBI11/YBI11 paper WBI16/6A was a grade A* in June 2026.
40 out of 50 on Edexcel XBI11/YBI11 paper WBI16/6A was a grade A in June 2026.
35 out of 50 on Edexcel XBI11/YBI11 paper WBI16/6A was a grade B in June 2026.
30 out of 50 on Edexcel XBI11/YBI11 paper WBI16/6A was a grade C in June 2026.
25 out of 50 on Edexcel XBI11/YBI11 paper WBI16/6A was a grade D in June 2026.
21 out of 50 on Edexcel XBI11/YBI11 paper WBI16/6A was a grade E in June 2026.