Pearson Edexcel International A Level Chemistry Grade Boundaries

Pearson Edexcel International A Level Chemistry is made up of 4-6 units, each marked out of raw marks that Pearson then converts to Uniform Mark Scale (UMS) points before combining. The figure to enter here is your total UMS score across all units (shown on your results slip as "UMS" or "Total UMS"), not your raw exam mark — the overall grade boundary is only ever published in UMS.

No — not directly. Pearson first converts each unit's raw mark to Uniform Mark Scale (UMS) points using that session's published conversion table, then it's the UMS points that get added together. Your results slip shows both your raw mark and your UMS mark per unit; use the UMS total in this tool, not the raw total.

Pearson International A Level Chemistry is split into AS units (sat after year 1) and A2 units (sat after year 2), each covering different topics — the full specification lists the exact breakdown. A* isn't shown here because Pearson never publishes a single tabulated A* threshold for the overall qualification; it's awarded separately, based on your UMS performance specifically on the A2 units.

This tool has grade boundary data for the following years: 2026, 2025, 2024, 2023, 2022, 2019. All data is from the May/June examination series, which is the main series for most students.

Pearson uses a Uniform Mark Scale (UMS) for International A Level: each unit's raw mark is converted to UMS points before the units are combined, and that conversion is specifically calibrated each session so the final grade boundaries (80/70/60/50/40% of max UMS) stay fixed. The "difficulty adjustment" other boards make to their overall boundary happens here instead at the per-unit raw-to-UMS conversion stage, which isn't published as a single table — the UMS boundary you see is the same every year by design.

If your mark is within 2–3 marks of the next grade boundary, it may be worth asking your school about an Enquiry About Results (EAR) or a clerical check. One mark can sometimes be the difference between grades. Note that mark reviews can result in grades going up, staying the same, or going down — discuss with your teacher before requesting one.

These are the officially published Pearson Uniform Mark Scale (UMS) boundaries for the overall qualification, provided for reference only. Because the UMS boundary is fixed by design, this figure doesn't change on results day the way raw-mark boards' boundaries do — but always verify against your own results slip and the official Pearson website.

The terms are used interchangeably. A grade threshold (Cambridge terminology) or grade boundary (AQA/Edexcel terminology) is the minimum raw mark needed to achieve a particular grade in that examination series.