IB Diploma vs A Levels vs AP: Which Pathway, Which Universities, and How to Choose
Quick Answer: The IB Diploma is six subjects plus a core, scored out of 45. A Levels are three or four subjects graded A* to E. AP is a menu of single-subject US college-level exams scored 1 to 5. All three get students into UK, US, Singapore and Australian universities; the choice comes down to breadth versus depth, how the child copes with a single exam session, and which school offers what.
The three main pre-university pathways at international schools are the IB Diploma (six subjects plus a core, scored out of 45), A Levels (three or four subjects, graded A* to E) and Advanced Placement (single US college-level courses, each scored 1 to 5). All three are accepted by universities in the UK, the US, Singapore, Hong Kong and Australia. The right one depends on whether the child does better with breadth or depth, how they handle a single exam session, and which schools near you offer what. This guide sets out the structure, grading, workload, cost and recognition of each, with 2026 results from schools on our Singapore international schools page.
How is each qualification built?
The IB Diploma Programme is for ages 16 to 19. Students take one subject from each of six groups, three or four at higher level (240 teaching hours) and the rest at standard level (150 hours), plus the core: theory of knowledge, the extended essay and creativity, activity, service (CAS). The structure is set out on the IB's curriculum page. Exams are set globally in May and November; May results came out on 6 July in 2026.
Cambridge International A Levels are two-year, single-subject qualifications. Cambridge offers 55 subjects and schools can combine them freely; most students take three or four. Each subject can be taken as an AS Level (half the content) and extended to the full A Level, sat in one go or in the "staged" route across two series. Exam series run in June and November with results in August and January, per Cambridge International.
Advanced Placement is not a diploma. It is a catalogue of college-level courses from the College Board that a student takes alongside a US high school diploma, each ending in a single annual exam. Students choose how many to take; there is no minimum. The College Board describes AP as a way to earn college credit and placement while still at school.
How are they graded, and what counts as a good result?
| IB Diploma | A Levels | AP | |
|---|---|---|---|
| Subjects | Six (3 or 4 HL) plus TOK, EE, CAS | Usually 3 or 4 | Any number, no minimum |
| Grading | 1 to 7 per subject, up to 3 core points, 45 maximum, 24 to pass | A* to E per subject (AS: A to E) | 1 to 5 per exam |
| Assessment | Exams plus internal assessment (orals, labs, investigations) | Exams, some coursework | One exam per course, multiple choice and free response |
| Exam sessions | May and November | June and November | Once a year |
| World benchmark, 2026 | Average 30.88, 209,607 students | Cambridge publishes grade thresholds by series | Credit usually from 3 |
| Singapore examples, 2026 | Tanglin 39.1, Dulwich 37.7, UWCSEA 36.3, Nexus 35.7 | Tanglin: 32% A*, 63% A* or A | Stamford: average 3.6, 87% at 3 or above |
| Exam fees (school guides) | S$1,200 to S$1,800 (UWCSEA) | S$1,000 to S$2,500 (Tanglin) | US$129 per exam outside the US |
The IB awards the same points for higher and standard level, and the diploma requires at least 24 points plus completion of the core; theory of knowledge and the extended essay together can add up to 3 points, as the IB's assessment page explains. In the May 2026 session 209,607 students received results at a global average of 30.88. A Levels are reported A* to E, with no A* at AS Level. AP results are a 5-point scale that the College Board describes as a recommendation on college credit; many US colleges grant credit from 3, but each sets its own bar.
Which is the heavier workload?
The IB is the most demanding on breadth and organisation: six subjects, a research essay, a philosophy-style course and a logged CAS record over two years, with most of the mark decided in one exam window. A Levels concentrate effort into three or four subjects, so a student can go deeper and drop what they dislike; the cost is that a weak subject choice at 16 is hard to reverse. AP sits in between and is the most flexible: a student can take two APs or eight, and each is independent, so one bad exam does not sink the whole record. The Cambridge vs IB guide covers the years leading up to this choice, and IB vs IGCSE schools in Singapore lists which schools run which track.
How do universities treat each one?
UK. Universities publish offers in both A Level grades and IB points, usually with minimum higher-level grades for IB applicants, and the UCAS Tariff assigns points to both for institutions that use totals. UK universities also accept AP, setting requirements course by course, so check each course page. US. All three are accepted; AP and higher-level IB subjects can earn credit that shortens a degree, which is why Stamford American runs AP alongside the IB. Singapore, Hong Kong and Australia. Check each university's international admissions page for its IB, A Level and AP standards; the IB's recognition pages list country statements. Before results day the IB sends transcripts to six universities free of charge.
Which schools offer what?
In Singapore the IB Diploma is the default at UWCSEA, Dulwich, Nexus, CIS, GESS, OFS and SJI International; Tanglin Trust offers A Levels or the IB and published both sets of 2026 results on its results page; Stamford American runs AP and the IB and reported a 2026 AP average of 3.6 on its results page; Australian International School pairs the IB with the HSC. Outside Singapore the same split appears: Regents International School Pattaya, for example, runs both A Levels and the IB and bills the exam fees for each separately.
How should you choose?
- Start from the destination. A UK medicine or engineering course wants specific subjects at high grades; the US wants a transcript with rigour across four years; Singapore's public universities set their own IB and A Level standards.
- Be honest about breadth. A child who wants to drop languages or maths at 16 will resent the IB. One who cannot choose will resent A Levels.
- Check the exam-day temperament. The IB and A Levels are decided mostly in one session; AP spreads risk across independent exams.
- Look at the school's actual results, not the qualification's reputation. A 35-point IB cohort and a 63% A*/A A Level cohort can sit in the same building.
- Budget the exams. They are billed on top of tuition almost everywhere.
Frequently asked questions
- Is the IB harder than A Levels?
- It is broader rather than harder. An IB Diploma student takes six subjects across six groups, three or four at higher level, plus theory of knowledge, an extended essay and CAS, and is scored out of 45 with 24 needed to pass. An A Level student usually takes three or four subjects to a greater depth, each graded A* to E. A student who is strong in a narrow field tends to find A Levels easier; an all-rounder often prefers the IB.
- What IB score is equivalent to A Level grades?
- There is no official conversion. UK universities publish separate offers in each currency, for example a points total with minimum higher-level grades for IB applicants and letter grades for A Level applicants, and UCAS gives both qualifications Tariff points that some universities use instead. In May 2026 the world average IB score was 30.88; Singapore schools reported 34 to 39.1.
- Is AP the same as A Levels?
- No. AP is a set of single-subject, college-level courses run by the College Board, each ending in one exam scored 1 to 5. There is no fixed number of APs and no diploma; students pick courses alongside a US high school diploma. A Levels are two-year subject qualifications graded A* to E, and three or four of them are the whole programme. Both are accepted by US and UK universities, but AP is designed around the US system of college credit.
- Which is better for US universities, IB or AP?
- Both work. US colleges grant credit or advanced placement for AP scores of 3 and above, with each college setting its own thresholds, and treat higher-level IB subjects similarly. The IB Diploma has the edge as a whole programme with a core and a transcript; AP has the edge for a student who wants to stack college-level courses in one field. A Levels are also accepted, subject by subject.
- How much do IB, A Level and AP exams cost?
- Schools bill exam fees on top of tuition. Singapore guides for 2026/27: UWCSEA S$1,200 to S$1,800 for the full IB Diploma, Tanglin Trust S$1,000 to S$2,500 for A Level or IB depending on subjects, SJI International S$238 per IB subject. AP exams cost US$129 each outside the United States and Canada for 2027 (US$99 inside). Regents Pattaya quotes THB 35,000 to THB 65,000 for IGCSE, A Level or IB entries.
- Which Singapore international schools offer IB, A Levels and AP?
- UWCSEA, Dulwich, Nexus, CIS, GESS, Overseas Family School and SJI International run the IB Diploma. Tanglin Trust offers a choice of A Levels or the IB. Stamford American runs both AP and the IB alongside a US high school diploma. Australian International School offers the IB or the Australian HSC. Filter by curriculum on the Singapore schools page to see the full list.
