Most of what US applicants read about the International Baccalaureate and UK universities is written for A-level students first, with an IB conversion note bolted on. That gets the shape of the system backwards. UK universities don't run the IB Diploma through one shared formula the way a US college runs the SAT through a superscore -- they publish their own IB requirement, course by course, and the number that actually matters is rarely the same thing twice. We pulled real, current offer figures directly from eight universities' own admissions pages to show what that looks like in practice, rather than repeating the single round number ("just get 38 points") that most guides default to.

The IB Diploma, in the terms UK universities actually use

The IB Diploma's own scoring, confirmed directly from the International Baccalaureate Organisation's own site, is simpler than the offers built on top of it: six subjects, three at Higher Level (HL) and three at Standard Level (SL), each graded 1-7, plus up to 3 bonus points from Theory of Knowledge and the Extended Essay combined. Maximum score: 45. Minimum to be awarded the Diploma at all: 24, with a handful of subsidiary conditions (no more than two grade-2s, at least 12 points across your three HL subjects).

UK universities write their offers against that same structure -- a total points figure, plus named HL grades -- not against a single US-style composite score.

UCAS does not convert your IB score into Tariff points

If you've read our breakdown of how SAT and ACT scores compare to UK/Ireland grades, you already know UCAS's Tariff system doesn't have an official SAT/ACT conversion. The IB Diploma turns out to work the same way, confirmed directly from UCAS's own current Tariff documentation: "The IB Diploma does not attract UCAS Tariff points... There is no overall allocation to the whole IB Diploma." Instead, UCAS scores each component separately:

| IB grade | UCAS Tariff points | |---|---| | HL 7 | 56 | | HL 6 | 48 | | HL 5 | 32 | | HL 4 | 24 | | SL 7 | 28 | | SL 6 | 24 | | SL 5 | 16 | | SL 4 | 12 | | TOK/EE, grade A (each) | 12 | | TOK/EE, grade B (each) | 10 |

Add up your three HL grades, three SL grades, and your TOK and Extended Essay grades, and you get a Tariff total that can run into the several hundreds -- a completely different number from your 24-45 IB Diploma score, and not one most universities' own IB offers reference directly. The universities below state their real requirement as an IB points total with named HL subjects, which is the number that actually determines your offer.

Real IB offers, from eight universities' own pages

Every figure below is quoted directly from that university's own course page, for a representative course, not a marketing-page rounded figure:

| University | Example course | Typical IB offer | Key HL requirement | |---|---|---|---| | University of Cambridge | University-wide minimum (all courses) | 41-42 points | 776 at HL -- one flat figure, unlike its own tiered AP/SAT/ACT policy | | University of Oxford | Computer Science | 39 points | 766 at HL, with the 7 in Maths | | Imperial College London | Mechanical Engineering (typical offer) | 40 points | 77 at HL in Maths and Physics | | University of Edinburgh | Economics | 37-40 points (range) | 666-766 at HL, including Maths | | University of Bristol | Mathematics | 40 points | 18 at HL including a 7 in HL Maths | | University of Warwick | Economics and Management | 38 points | 6 in HL Mathematics | | University of Nottingham | Economics | 36 points (or 34 with HL Maths) | 766 at HL | | University of Manchester | Economics | 36 points | 666 at HL including Maths |

Two things stand out once you line these up. First, Cambridge is the outlier in structure, not just level: it publishes one university-wide minimum (41-42, 776 HL) that repeats near-identically across course pages we checked, rather than varying by subject the way its own AP/SAT/ACT policy does -- see our full Oxford vs. Cambridge comparison for exactly how that plays out against Oxford's course-by-course approach. Second, the points total alone understates how much offers actually differ -- Nottingham's Economics offer drops from 36 to 34 points specifically if you hold HL Maths, and most of the schools above name an exact HL subject and grade rather than just a total. We cover that pattern on its own, because it's the part most general IB guides skip.

What this means for you

  • There is no single "good IB score" for UK universities -- competitive offers cluster 36-40 points, but the real bar is course-specific, and Oxbridge in particular runs higher (38-42+).
  • Check the named HL subject and grade, not just the points total. A 38-point offer that requires HL7 Maths is a different bar than a 38-point offer with no named subject.
  • UCAS's Tariff points are not the number your university states its offer in. Don't try to reverse-engineer your IB score from a Tariff calculator -- read the university's own course page for its actual IB figure.
  • No UK university or UCAS publishes an official "IB is equivalent to X A-level grades" table -- we checked this claim directly, and every UK university sets its IB requirement independently.
  • If you miss your IB offer, your timeline looks different from an A-level student's -- IB results come out about five weeks before A-level results, which changes how Clearing actually plays out for you. We cover what that means in practice.
  • Applying to Ireland instead (or as well)? The CAO's own IB conversion table is real, but it's built for a different applicant than most US students -- see how that actually breaks down.

Sources

IB Diploma structure and scoring confirmed directly from the International Baccalaureate Organisation's own DP passing criteria page. UCAS Tariff figures confirmed directly from UCAS's own current Tariff points page and its Tariff methodology documentation, which states plainly that the IB Diploma as a whole does not carry an overall Tariff allocation. University-specific IB offers are quoted directly from each institution's own official course pages: Cambridge's accepted qualifications page, Oxford's Computer Science admissions page, Imperial's Mechanical Engineering course page, Edinburgh's Economics entry requirements, Bristol's Mathematics course page, Warwick's Economics and Management course page, Nottingham's Economics course page, and Manchester's Economics course page.