O Levels Grading System Explained

The O Level grade scale

Cambridge O Level results are reported from A* (the highest) down to E. A result below the lowest grade is shown as U, which means ungraded. Results are given per subject.

IGCSE results follow a similar idea, but the scale depends on the syllabus: many report A* to G, and some report numbers from 9 to 1. The syllabus for your subject code says which scale applies.

How marks become grades

Each paper has a total mark, and the marks from all papers in a subject are combined, usually with each paper weighted as the syllabus states. The combined mark is then compared with the grade thresholds for that series.

Grade thresholds are the minimum marks needed for each grade. They are decided after each series and published by the board, so the same mark can give different grades in different series. This is why students should not rely on the thresholds of one year when planning.

How to use this when revising

Aim for secure marks across the whole paper rather than aiming at a threshold. Past papers and mark schemes show where marks are earned, and our guide to past papers explains how to use them.

If a result is lower than expected, the board offers a review of marking in some cases. Ask your exam centre about the process and the deadlines.

O Levels grading system: Where to Go Next

If you want help with a subject, see O Levels tutors. For more guides, see O Levels resources, and for exam papers, our past-paper library.

For the rules, syllabuses and dates themselves, use the official websites: Cambridge International Education. Boards change details from time to time, so check them before you plan.

Frequently Asked Questions