
A-levels vs. IB: Key Differences Guide
Understand the key differences between A-levels and IB. Learn about subject load, specialisation, mandatory research (Extended Essay/EPQ), and UCAS points conversion.
A-levels vs. IB: Key Differences
The question of whether to choose A-levels or the International Baccalaureate has faced many students and their parents. We know it can be difficult to understand the differences between the 2, so we hope breaking down the key differences between the 2 courses will help you decide which one is right for you.

The key difference between the International Baccalaureate and A-levels is the number of subjects that students have to take. A-level students normally take between 3 and 4 subjects, having the option of taking an AS level in year 12 in one subject and dropping this hereafter. This means that A-level student will study the subjects they take through to A-level in greater depth and can expect to have around 10 hours of teaching per subject per week. By comparison, IB students take 3 subjects at Higher Level and 3 subjects at Standard Level. In their Higher Levels, students can expect to study in equivalent detail to the A-level course, but with around 5 hours of teaching per week; whilst Standard Level subjects cover a smaller amount of content with around 3 hours of teaching per week. This allows International Baccalaureate students to study a greater range of content, perhaps sacrificing some depth in the process.
The International Baccalaureate has 6 subject groups that students can choose from. Students must study Maths, Science (or Computer Science), Humanities, a language and English, and have a free 6th choice which can be within one of the previous 5 groups or an Arts subject such as Drama. This means that IB students graduate with a wide-ranging skillset and competencies across a large number of fields. By comparison, students studying A-levels are likely to be more specialised in 3 or 4 subjects but this may come at the expense of some other skills.
A-level students have the option of undertaking an Extended Project Qualification (EPQ) in a subject of their choosing. This typically takes the form of a 1,000 to 5,000-word research project exploring an area in depth. Similarly, IB students must undertake an Extended Essay during their IB Diploma in a chosen subject area. This is a 4,000-word research project, similar to a small university dissertation, but unlike the A-level EPQ is a mandatory requirement of the IB course. Both of these research opportunities enable students to investigate a topic that they are especially interested in and so are good preparation for undergraduate academic research.
However, students also study Theory of Knowledge (ToK) as part of the IB’s ‘core’ syllabus. ToK asks students to think about the nature of knowledge: It questions how we know what we know within each of the 6 IB subject groups, developing an awareness of our assumptions and an ability to think critically. The assessment takes the form of a Theory of Knowledge presentation on a topic the student chooses and a 1,500-word essay on one of 6 prescribed questions.
Additionally, IB students also complete a Creativity, Activity and Service (CAS) project. This requires students to be involved in the arts, physical activity and voluntary work over the course of their 2-year IB Diploma. Again, this is an example of how the IB develops students who are well rounded and excel in more than their academic subjects. For a flavour of some of the CAS projects students can undertake, please feel free to read Tim’s article. If you’re considering additional support to excel in your IB studies, whether it’s navigating CAS projects, the Extended Essay, or any IB subject, check out our 1:1 Tutoring offering to get tailored academic guidance.
If you want more information on how you can effectively transition into the IB or university, we are able to meet in person or via Skype to offer help and advice, having many years of IB & university experience at top universities such as Cambridge, Oxford and UCL. Please contact us for more details.
University applications
In order to compare the variety of Further Education qualifications, the University and College Admissions Service (UCAS) convert IB and A-level scores into UCAS points. This means universities can compare applicants with different qualifications directly when they apply. Below is a summary of the UCAS points A-level and IB students can hope to achieve:






It is clear that UCAS equate a level 7 at IB Higher Level with an A* at A-level, but weight a level 7 at IB Standard Level slightly more than an A (the top mark) at AS level. A-level students do gain back some ground, with an A* in their EPQ qualification being weighted 4 UCAS points higher than 2As in the IB Extended Essay and Theory of Knowledge.

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The primary difference lies in breadth versus depth. The IB Diploma requires students to study 6 subjects (3 Higher Level, 3 Standard Level) across diverse subject groups, alongside core components like the Extended Essay, Theory of Knowledge, and CAS. A-Levels typically involve specialising in 3-4 subjects, allowing for greater depth in those specific areas.
IB Diploma students take 6 subjects: 3 at Higher Level (HL) and 3 at Standard Level (SL). These cover a broad range of disciplines. A-Level students typically choose 3 or 4 subjects, allowing them to focus more deeply on fewer academic areas.
The IB Diploma has three mandatory core components: the Extended Essay (EE), a 4,000-word independent research paper; Theory of Knowledge (ToK), which encourages critical thinking about the nature of knowledge; and Creativity, Activity, Service (CAS), involving practical projects in the arts, physical activity, and voluntary work. These components foster holistic development.
Universities use UCAS points to standardise and compare both qualifications. Both the IB Diploma and A-Levels are highly respected globally. The IB is often valued for its breadth, critical thinking development, and research skills, while A-Levels demonstrate deep specialisation. Many universities have specific entry requirements for both, so it's crucial to check.
Both qualifications are academically rigorous. The IB Diploma demands a broader engagement across six subjects and the core components, which can be challenging for students who prefer to specialise early. A-Levels allow for deeper focus on fewer subjects. The "difficulty" often depends on a student's individual learning style, strengths, and university aspirations.
Our free IB consultation is an excellent first step. Our Student Success Experts, many of whom are high-achieving IB graduates themselves, can discuss your academic strengths, university aspirations, and learning style to help you understand which path might be a better fit. They offer personalised insights based on years of experience guiding students and parents through this crucial decision.
Absolutely. Our expert tutors, including those who scored 40+ in the IB and teachers with examiner experience, provide tailored support for all IB core components. We guide students through refining research questions, structuring essays, developing critical thinking for ToK, and planning meaningful CAS projects, all while ensuring strict adherence to academic honesty guidelines.
It's a free, no-pressure 20-30 minute conversation with one of our expert IB Student Success Experts. Designed for students and parents, it helps you gain clarity on your IB journey, clear up doubts, and walk away with a simple, personalised plan for what to focus on next, backed by the experience of a team that has supported thousands of IB students.
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Our Student Success Experts are highly experienced individuals, often high-achieving IB graduates themselves, who have supported thousands of IB students and parents worldwide. They possess deep understanding of the IB curriculum and are skilled at identifying individual needs, clarifying options, and crafting effective strategies for success.
Lanterna offers comprehensive 1:1 online tutoring across all IB subjects (SL and HL) and core components. Our tutors, including 40+ point graduates and experienced IB teachers, provide personalised support to help you excel. We can help you build a strong study plan, refine your approach to challenging topics, and ensure you're on track for your desired grades and university applications. Our free consultation is the perfect place to start.
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