I remember staring at the subject selection form during my second year at my international school in Tokyo. The pressure to pick the right combination felt heavy because I wanted every door open. I eventually hit 45/45 in May 2023 and now hold offers from Cambridge HSPS, HKU, and HKUST.
Picking subjects for engineering requires a specific strategy. You will likely struggle with the sheer workload of HL Math AA combined with Physics, especially when the internal assessments pile up in March. I wrote this guide to help you balance those requirements while keeping your GPA high enough for top-tier universities.
The Non-Negotiables: Mathematics at Higher Level
Let's start with the absolute essential: Mathematics at Higher Level (HL). There's simply no way around this for any serious engineering applicant. Whether you choose Analysis and Approaches (AA) or Applications and Interpretation (AI), most top engineering programs, especially in the UK, will explicitly require HL Math. I took Math AA HL, and it was incredibly challenging but rewarding. The deep dive into calculus, vectors, and complex numbers is foundational to almost every engineering discipline.
For UK universities like Cambridge, Imperial, and Warwick, Math AA HL is often preferred, sometimes even explicitly required over AI HL. They want to see a strong theoretical understanding. US universities might be slightly more flexible, but a strong performance in HL Math AA will undoubtedly strengthen your application. Hong Kong universities like HKU and HKUST also place a high emphasis on HL Math, often setting specific grade requirements (e.g., a 6 or 7). Don't underestimate the workload; consistent practice from day one is key.
Physics HL: The Second Pillar of Engineering
After HL Math, Physics HL is the next most critical subject for aspiring engineers. Engineering, at its core, is applied physics. From mechanics and electromagnetism to waves and thermodynamics, the concepts you learn in Physics HL directly translate to first-year university engineering courses. Skipping Physics HL would put you at a significant disadvantage, both in terms of university applications and your preparedness for the degree itself.
Most competitive engineering programs in the UK, US, and Hong Kong either require or strongly recommend Physics HL. For example, Cambridge Engineering explicitly lists Physics HL as a required subject alongside Math HL. My own experience with Physics HL was intense, with a heavy emphasis on problem-solving and conceptual understanding. Mastering topics like forces, motion, and energy conservation in the IB curriculum will give you a head start on university-level mechanics and dynamics.
The Third HL: Chemistry, Computer Science, or Further Math?
This is where your choices become more nuanced and depend on your specific engineering interests. While Math HL and Physics HL are almost universally required, your third HL subject can provide a competitive edge or cater to a particular engineering path. The most common and beneficial choices are Chemistry HL, Computer Science HL, or, for the truly ambitious, Further Mathematics HL (if your school offers it).
If you're considering Chemical Engineering, Materials Science, or Biomedical Engineering, Chemistry HL is a natural and often required choice. For Electrical Engineering, Software Engineering, or even Mechanical Engineering with a strong computational focus, Computer Science HL is incredibly valuable. I personally took Chemistry HL as my third HL, which kept my options broad, including chemical and materials engineering. Think about what specific field of engineering excites you most and choose accordingly, but always verify university-specific requirements.
Standard Level Subjects: Strategic Support
Don't dismiss your Standard Level (SL) subjects as mere afterthoughts; they can still play a strategic role. While they won't carry the same weight as your HLs for engineering admissions, certain SL choices can complement your core subjects and demonstrate a broader skill set. For instance, if you didn't take Computer Science at HL, taking it at SL can still show an interest and foundational knowledge in programming, which is increasingly relevant across all engineering disciplines.
Similarly, a strong performance in a Language B SL demonstrates linguistic proficiency, which is valuable in an increasingly globalized engineering world, though it won't directly impact your technical readiness. My own SL choices included English A Literature, Japanese B, and Economics. While English and Japanese didn't directly contribute to my engineering application, Economics SL did provide a useful analytical framework that can be applied in project management and resource allocation within engineering contexts.
The Importance of Grades and Predicted Scores
Subject choice is only half the battle; your predicted grades and final scores are equally, if not more, important. For top UK universities like Cambridge or Imperial, you'll typically need predicted scores of 7 in Math HL and Physics HL, and often a 7 in your third HL, alongside an overall score of 40-42+. US universities look at a more holistic profile, but strong grades in your STEM subjects are paramount. Hong Kong universities like HKU and HKUST often specify minimum scores for individual HL subjects (e.g., a 6 or 7 in Math HL and Physics HL).
These aren't just arbitrary numbers; they reflect your mastery of the content. Admissions tutors want to see evidence that you can handle the academic rigor. Consistently aiming for the highest possible grades in your core engineering subjects is non-negotiable. This means active participation, diligent homework, and thorough exam preparation, especially for the notoriously challenging IB final exams.
Beyond the Classroom: Supplementing Your IB Choices
While your IB subjects form the academic backbone of your application, engineering admissions committees also look for evidence of genuine passion and aptitude beyond the curriculum. This is where extracurricular activities, personal projects, and relevant work experience (if accessible) come into play. Building a robot, participating in a coding competition, designing something with CAD software, or even just tinkering with electronics at home can significantly strengthen your application.
For UK applications, the personal statement is where you weave these experiences together with your subject choices to tell a compelling story. For US applications, essays and activity lists serve a similar purpose. For Hong Kong, while less emphasis is placed on extensive personal statements, demonstrating practical interest can still differentiate you. These activities show initiative, problem-solving skills, and a genuine curiosity that goes beyond textbook learning, reinforcing your commitment to engineering.
Country-Specific Nuances: UK, US, and Hong Kong
The emphasis on certain subjects can vary slightly by region. UK universities, particularly the most selective ones, are very prescriptive: Math HL and Physics HL are almost always mandatory. They value depth in these core subjects. My Cambridge application, for example, heavily scrutinized my Math and Physics performance, including my performance in additional admissions tests like the ENGAA.
US universities, while still valuing strong STEM foundations, often appreciate a broader academic profile. They might look favorably on a student who excels in Math HL and Physics HL but also has a strong score in an English HL or a humanities subject, demonstrating well-roundedness. Hong Kong universities like HKU and HKUST blend these approaches, having clear subject prerequisites (especially for Math and Physics) but also considering overall academic strength and, to a lesser extent, extracurricular engagement. Always check the specific program requirements for each university you're interested in, as they can change annually.
Frequently asked questions
For international students targeting engineering degrees in the UK, US, and Hong Kong, the core IB subjects are non-negotiable: Mathematics Analysis and Approaches HL and Physics HL are essential. Your third HL choice, whether Chemistry, Computer Science, or Further Mathematics, should align with your specific engineering interests. Combine strong academic performance in these subjects with relevant extracurricular activities to build a compelling application that showcases both your aptitude and passion for engineering.