Grade boundaries

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

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

Level

Board

Course

International AS and A level Biology XBI11/YBI11

Boundaries

Paper

Type a mark to see its grade.

The boundaries

June 2026 · WBI111

GradeNeeds
A58 of 80
B51 of 80
C45 of 80
D39 of 80
E33 of 80

Every course·Mock grade calculator

Marks for each grade in June 2026

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.

Every paper in June 2026

Every series

20 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.

GradeWBI11/1out of 80WBI11/1Aout of 80WBI12/2out of 80WBI12/2Aout of 80WBI13/3out of 50WBI13/3Aout of 50WBI14/4out of 90WBI14/4Aout of 90WBI15/5out of 90WBI15/5Aout of 90WBI16/6out of 50WBI16/6Aout of 50
A*––––––626372724545
A585858573638565764644140
B515151503133505156563635
C454544432628444548483130
D393937372124383940412625
E333331311720323333342221

January 2026

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

GradeWBI11/1out of 80WBI11/1Aout of 80WBI12/2out of 80WBI12/2Aout of 80WBI13/3out of 50WBI13/3Aout of 50WBI14/4out of 90WBI14/4Aout of 90WBI15/5out of 90WBI15/5Aout of 90WBI16/6out of 50WBI16/6Aout of 50
A*––––––616167674343
A545457573838555560603838
B484850503333494953533333
C424243432828444447472929
D363637372323393941412525
E303031311919343435352121

October 2025

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

GradeWBI11/1out of 80WBI11/1Aout of 80WBI12/2out of 80WBI12/2Aout of 80WBI13/3out of 50WBI13/3Aout of 50WBI14/4out of 90WBI14/4Aout of 90WBI15/5out of 90WBI15/5Aout of 90WBI16/6out of 50WBI16/6Aout of 50
A*––––––606067674545
A535355554040545460604040
B474748483535484853533535
C414141413030434347473131
D353535352525383841412727
E292929292121333335352323

June 2025

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––616743
A545738556038
B485033495333
C424328444729
D363723394125
E303119343521

January 2025

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––596442
A495433535738
B434729475034
C374025414330
D313322353626
E252719303022

October 2024

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––566342
A465333505638
B404629444934
C353925384230
D303222333526
E252619282922

June 2024

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––576142
A495833535738
B445429495334
C395025454930
D354621414626
E314218384322

January 2024

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––506146
A495537475643
B435132445138
C384727414633
D334323394228
E283919373823

October 2023

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––475946
A475437455543
B414932435138
C354527414733
D304123394328
E253719373923

June 2023

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––475946
A485539455543
B425134435138
C374729414733
D324324394328
E273920373923

January 2023

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––454636
A374531393931
B324126363526
C273722333121
D233318302716
E192914282311

October 2022

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––454636
A374531393931
B324126363526
C273722333121
D233318302716
E192914282312

June 2022

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––454636
A374531393931
B324126363526
C273722333121
D233318302716
E192914282311

January 2022

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––545443
A373829454540
B313225373733
C262621292926
D212118222119
E161615151313

October 2021

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––545042
A373827454139
B313223373432
C262619292725
D212116212019
E161613141313

January 2021

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––585543
A404333494738
B333628403831
C262923313024
D192219222217
E131615131411

November 2020

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90WBI15/5out of 90WBI16/6out of 50
A*–––575444
A414331484639
B343626393831
C272921303024
D212217212217
E151613131410

January 2020

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50WBI14/4out of 90
A*–––59
A48473755
B43433351
C38392947
D33352543
E29312240

October 2019

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

GradeWBI11/1out of 80WBI12/2out of 80WBI13/3out of 50
A505237
B464833
C424429
D394125
E363822

June 2019

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

GradeWBI11/1out of 80WBI12out of 80WBI13out of 50
A475036
B434632
C394228
D353925
E313622

Questions

Which series of Edexcel International AS and A level Biology XBI11/YBI11 grade boundaries are there?

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

Other Edexcel A level 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.