Examination Board Analysis
Top Grades Compared: IB vs A-Level vs DSE vs AP
What percentage of students achieve the highest grades in each major qualification system? Using the equivalence established in our Oxbridge admission requirements analysis — DSE 5+ as comparable to IB 6+, GCE A*, and AP 5 — we compare top-grade attainment subject by subject across the four examination boards.
Grade Equivalence
Key Findings
GCE International A-Level students hold a clear advantage in Mathematics (49.1%) and Further Mathematics (56.5%) — the A/A* rate in both subjects is the highest of any board, reflecting the depth and specialisation the A-Level system allows.
IB and GCE students consistently achieve the strongest top-grade rates in the sciences — Biology (GCE 30.0%, IB 24.6%), Chemistry (IB 38.9%, GCE 33.8%), and Physics (IB 39.4%, GCE 31.8%) all favour the two boards over DSE and AP.
IB holds a decisive edge in business and economics — Economics (44.8%) and Business Management (32.3%) both see IB HL students achieve the highest top-grade rates, reflecting the rigour of the IB's Higher Level coursework.
IB and GCE also give students an edge in humanities and arts subjects — IB leads in Geography (42.1%) and English (25.7%), while GCE dominates History (50.1%), giving students at both boards a strong platform for arts and social science degrees.
Subject-by-Subject Comparison
Bars show the percentage of candidates achieving the top grade. The highest rate in each row is highlighted in maroon.
| Subject | DSE (5+) | IB (6+7) | GCE iAL (A+) | AP (5) |
|---|---|---|---|---|
| English | 10.1% | 25.7% | 13.3% | 15.0% |
| Mathematics (Core) | 18.1% | 24.0% | 49.1% | 20.0% |
| Further Maths / M2 | 39.1% | 38.9% | 56.5% | 46.0% |
| Biology | 20.1% | 24.6% | 30.0% | 15.0% |
| Chemistry | 26.1% | 38.9% | 33.8% | 15.0% |
| Physics | 30.4% | 39.4% | 31.8% | 19.0% |
| Economics | 17.0% | 44.8% | 40.7% | 19.0% |
| History | 13.3% | 18.1% | 50.1% | 14.0% |
| Geography | 13.2% | 42.1% | 29.3% | 19.0% |
| Business | 7.2% | 32.3% | 24.6% | N/ANo AP equivalent |
| Average | 19.5% | 32.9% | 35.9% | 20.2% |
Methodology & Subject-Mapping
- IB level selection: Higher Level (HL) was used for sciences and humanities as the level most comparable to DSE's difficulty. For Mathematics, Analysis & Approaches SL was used as the core-Maths equivalent and Analysis HL as the Further Maths / M2 equivalent.
- AP subject mapping: AP Economics is split into Microeconomics and Macroeconomics — the two were averaged. AP has no direct Business Management equivalent. Calculus BC was used as the Further Maths equivalent, and Calculus AB as core Maths.
- GCE iAL Further Maths: Maps to DSE M2 (Mathematics Extended Module 2 — Algebra & Calculus), consistent with the mapping used in our Oxbridge admission requirements analysis.
- English: DSE Core English is compared to IB English A: Language and Literature HL, GCE English Language, and AP English Language & Composition — the most commonly required English qualifications for university admission.
Sources: (1) 2026 HKDSE Results Statistics; (2) IB Diploma Programme Statistical Bulletin, May 2026; (3) Cambridge International A Level Candidate Grades, June 2026 (Provisional); (4) 2026 AP Score Distributions.