Published on: July 30, 2026

Choosing IB subjects for an engineering pathway is one of the decisions that matters most and gets thought about least. Most students know they need Physics and Maths. What they are less clear on is which level, which second science, and how the whole combination reads to a university admissions office.

The Non-Negotiables

If engineering is your goal, two subjects are effectively compulsory at Higher Level.

• Mathematics AA HL: Cambridge, Imperial, ETH Zurich, NUS, and virtually every institution that matters for engineering expects this. AA SL is not sufficient for most competitive programmes. AI at either level is not considered equivalent by the vast majority of engineering programmes.
• Physics HL: Engineering is applied physics. Every leading engineering programme globally expects Physics HL. There are no meaningful exceptions among competitive institutions.

The Third HL: Chemistry or Computer Science?

Beyond Maths AA HL and Physics HL, most competitive engineering applicants take a third rigorous subject.

• Chemistry HL or SL is particularly relevant for Chemical, Materials, Environmental, and Biomedical Engineering. For more traditional engineering fields like mechanical or civil, Chemistry SL is a reasonable supporting subject.
• Computer Science HL has become increasingly relevant as engineering programmes across all disciplines become more computational. A student with Physics HL, Maths AA HL, and Computer Science HL signals both scientific foundation and digital fluency. This reads especially well for Electrical, Computer, and Software Engineering.

At JBCN School, students pursuing engineering pathways commonly combine Physics HL and Maths AA HL with either Chemistry or Computer Science at HL, depending on their specific engineering interest.

Subject Combinations That Work Well

• Mechanical or Aerospace Engineering: Physics HL, Maths AA HL, Chemistry HL, Economics SL, English A SL, one further elective.
• Electrical or Computer Engineering: Physics HL, Maths AA HL, Computer Science HL, Economics SL, English A SL, one further elective.
• Chemical or Biomedical Engineering: Physics HL, Maths AA HL, Chemistry HL, Biology SL, English A SL, Economics or Geography SL.
• Civil or Environmental Engineering: Physics HL, Maths AA HL, Geography SL or Economics SL, English A SL, two further electives.

What About JEE?

For students at JBCN’s Parel campus considering IIT or NIT through JEE alongside international university applications, the IB combination of Physics HL, Maths AA HL, and Chemistry HL maps reasonably well onto JEE subject requirements. The gap is not in subject coverage but in exam style, problem-solving speed, and certain topic areas where NCERT and IB diverge. Structured coaching begun in Grade 11 bridges this gap.

The Extended Essay Opportunity

An Extended Essay in Physics, Mathematics, or Computer Science addressing a genuine engineering question is a meaningful addition to an engineering application. At JBCN, Extended Essay supervision in science subjects is structured to help students identify research questions that demonstrate the kind of independent scientific thinking that competitive engineering programmes value.

What Competitive Universities Actually Require

• University of Cambridge Engineering: Maths AA HL strongly preferred, plus Physics HL. Explicitly states Maths AI is not accepted.
• Imperial College London Engineering: Maths and Physics at HL, typically 6 or 7. Chemistry is often listed as a preferred further subject.
• ETH Zurich Engineering: Maths and Physics at HL with strong scores expected.
• NUS Singapore Engineering: Maths HL and Physics HL. Competitive applicants typically present 38 or above overall.

The Bottom Line

Physics HL and Maths AA HL are fixed for engineering. The third HL depends on your specific engineering interest. Chemistry HL for chemical or biomedical engineering. Computer Science HL for electrical, computer, or software engineering. The remaining subjects should be chosen to create a well-rounded profile in which you can genuinely perform.

At JBCN School, engineering pathway planning begins in early secondary. Speak to our admissions team to understand how we support students from subject selection through to university offers.

Considering the IB Diploma Programme at JBCN? Speak to our admissions team about subject selection, university pathways, and how we support learners through both years.

Related Reading

• Best IB DP Subject Combinations for STEM and Medicine Aspirants
• IB HL vs SL: How to Choose Your DP Subjects
• Which Universities Accept the IB Diploma
• The Most Challenging IB Subjects and How JBCN Learners Approach Them

Share