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Grade Boundary

Chemistry

OCR A-level · June 2025 ·2 awards

2700243A*213A175B137C99D61E
Every boundary at its true height on the 270-mark scale.

Turn a mark into a grade

This is the total for the whole subject, not one paper. Working from paper marks? Use the paper calculator below.

of 270

Enter a mark to place it on the scale.

Every boundary published

Raw marks for the whole subject. The small figure under each is that mark as a percentage of the maximum — the only number that compares fairly across boards.

AwardCodeMaxA*ABCDEU
ChemistryH432270243902137917565137519937612300
Chemistry (Salters)H433270216801766514654117438833592200

Transcribed from Oxford Cambridge and RSA Examinations, June 2025 (PDF), retrieved 2026-08-16.

Work back from your paper marks

Fill in what you already have and leave the rest blank. A blank box means not sat yet, which is not the same as a zero.

Paper 01

/ 100

Paper 02

/ 100

Paper 03

/ 70
GradeNeedsFrom what's leftVerdict

The same subject on other boards, June 2025

Raw marks are not comparable between boards, because the maximum marks differ. The percentage of the maximum is the only fair comparison — and it is usually closer than people expect.

BoardAwardCodeMaxA*ABCDEU
OCRChemistryH432270243902137917565137519937612300
AQAChemistry74053002398019766162541274293315920
EdexcelChemistry9CH0300246822076917057133449632602000

All 1 AQA award →All 1 Edexcel award →

Other series

Questions

What was the grade C boundary for OCR A-level Chemistry in June 2025?
In June 2025, Chemistry: 137 out of 270; Chemistry (Salters): 117 out of 270.
Will the boundaries be the same next year?
No. Boards reset boundaries after every series so a grade means the same thing even when a paper is harder or easier than intended. Past boundaries tell you the likely range, not the answer.