IB Grades Explained: A Complete 1-7 Scale & Boundaries Guide

Most students and parents do not get confused by the 1 to 7 scale itself. They get confused by what that scale means in real terms, because IB grades are not in percentages, do not map cleanly onto A-Levels, and do not convert to a 4.0 GPA in any official way. 

At Ignite Training Institute, our IBDP tutors in Dubai hear the same questions every first week of tutoring. What does a 5 actually mean? Is 32 a good score? How do universities in the UK and the UAE read my points? This guide walks through the IB grading system end to end using the IBO’s published criteria and the UCAS tariff, so you finish with an accurate picture rather than a rough estimate.

What Is The IB Grading Scale? 

The 1 To 7 System Explained

The IB Diploma Programme uses a single grading scale across every subject, regardless of whether you sit it at Higher Level or Standard Level. Each subject is graded from 1 to 7, with 7 the highest and 1 the lowest. The grade combines internal assessment (marked by your school and moderated by the IBO) with external assessment (marked directly by IB examiners), and external assessment usually carries the larger weight.

IB grade	Descriptions
7	Excellent
6	Very good
5	Good
4	Satisfactory
3	Mediocre
2	Poor
1	Very poor

How Subjects Are Graded On The 1 To 7 Scale?

Each grade corresponds to a level of achievement defined by published grade descriptors. A grade 7 represents excellent performance with consistent conceptual understanding; a grade 1 represents very limited evidence of the required skills. Most subjects sit two or three written papers at the end of Year 13, plus an internal assessment that typically counts for 20 to 30 percent of the final grade.

Why Does The IB Use Criterion-Referenced, Not Norm-Referenced Grading?

This is one of the most important things to understand about IB grades. The IB uses criterion-referenced grading, which means your grade depends on whether you meet the published criteria, not on how you compare to other students. There is no enforced bell curve, and theoretically, every student in a cohort could score a 7 if they meet the criteria. A strong cohort does not pull your grade down.

How HL And SL Grades Compare On The Same Scale?

HL and SL subjects are graded against the same 1 to 7 scale using the same descriptors, but HL students cover a broader and deeper body of content. A grade 6 in HL Maths represents the same achievement as a grade 6 in SL Maths, just over more material. This is why the IB awards the same diploma points for HL and SL grades, even though HL is more demanding. Choosing your combination is a separate question, covered in our IB subject choices guide.

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How Are IB Grades Calculated?

IB grades are calculated by combining six subject grades (each scored 1 to 7) with up to three bonus points from the Extended Essay and Theory of Knowledge core components, giving a maximum total of 45 points. 

Six subjects times a maximum of 7 points gives 42 points from subjects, and the EE and TOK together can add 0 to 3 more points through a fixed matrix. IB CAS, the third core element, does not contribute points but must be completed for the diploma to be awarded. The minimum passing score is 24 points.

Total points alone do not determine whether you get the diploma. You can score 24 points and still not be awarded the diploma if you fail one of the conditional rules covered in the next section. Universities see your individual subject grades alongside your total, so a balanced 35 with consistent grades presents better than a 35 with one grade 2 dragging the profile down.

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How Many Points Do You Need To Pass The IB Diploma?

Hitting 24 points is necessary but not sufficient. There are six conditions you must meet for the diploma to be awarded, and missing any one means you receive Diploma Programme Course Results (DPCR) instead of the full diploma, even if your total is well above 24.

The Six Conditions Every IB Candidate Must Meet

The list below comes directly from the IBO’s published DP passing criteria. All six must be met for the diploma to be awarded.

1. CAS requirements are met: Creativity, Activity, Service must be completed and authenticated by your school.
2. At least 24 total points: Including bonus points from EE and TOK.
3. A grade has been awarded in every subject, TOK, and the EE: No unawarded grades anywhere.
4. At least a grade 2 in every subject: A grade 1 in any subject is a failing condition.
5. No more than two grade 2s:  Whether at SL or HL combined.
6. No more than three grade 3s or below: Whether at SL or HL combined.

There is also a separate condition tied to the core. An E grade in either the Extended Essay or TOK is a failing condition that prevents the diploma from being awarded, no matter how high your subject grades are. This is the rule that catches students out most often, because EE and TOK are sometimes treated as afterthoughts. high your subject grades are. This is the rule that catches students out most often, because EE and TOK are sometimes treated as afterthoughts.

What Happens If You Don’t Get The Full Diploma?

If you complete the full programme but miss one of the conditions, you do not walk away with nothing. The IBO issues Diploma Programme Course Results, which list your individual subject grades and core component results. Universities recognise DPCRs, and many accept them for admission where the missing point or condition is marginal.

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How Do TOK And The Extended Essay Bonus Points Work?

The Extended Essay and TOK are graded individually on a letter scale from A (highest) to E (lowest), and the two grades combine through a fixed matrix to award 0 to 3 bonus points towards your diploma total. These bonus points are often the difference between a 37 and a 40.

The EE/TOK Matrix (How A-E Grades Combine For 0 To 3 Points)

The table below is the IBO matrix for combining EE and TOK grades into core points.

EE grade ↓ \ TOK grade →	A	B	C	D	E
A	3	3	2	2	Fail
B	3	2	2	1	Fail
C	2	2	1	0	Fail
D	2	1	0	0	Fail
E	Fail	Fail	Fail	Fail	Fail

Two patterns stand out. You need at least an A in one component and a B in the other to secure all 3 bonus points. And any E grade in either component is an automatic failing condition, which is why the bottom row and rightmost column show Fail.

The “E Rule” That Costs Students Their Diploma?

An E grade in either the Extended Essay or TOK is a failing condition that prevents the diploma from being awarded, regardless of your subject grades. A student with a 42-point subject total and an E in TOK does not receive the diploma. The fix is to treat both core components as serious academic work in DP1, not something to write up in the last fortnight of DP2.

Why 3 Bonus Points Move You From 37 To 40?

Three points sound small until university offers are pitched at round numbers. Cambridge sits at 40 to 42 with 776 at HL. LSE and Imperial sit around 38 to 39. If your subjects give you 37, three bonus points take you to 40 and into the Cambridge range. This is why our IB tutors treat EE supervision and TOK essay drafting as part of the core programme.

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What Are IB Grade Boundaries & Why Do They Change Every Session?

Grade boundaries are the raw mark thresholds that determine where one grade ends and the next begins in a given subject and session. They are not fixed percentages. The IBO recalculates boundaries after every May and November session, for every subject, accounting for the difficulty of that session’s papers and the worldwide performance of the cohort.

Why There Is No Fixed IB Grade To Percentage Conversion?

This is the single most common factual mistake in IB-grades content online. The IBO does not publish a fixed grade-to-percentage conversion, and any blog claiming “a 7 equals 90 to 100 percent” or “a 6 equals 80 to 89 percent” is presenting an estimate as a rule. 

Ivy Coach’s published position is that the IB does not provide or endorse a conversion table to USA grading scales or the 4.0 GPA scale, and the IB’s own best-practice guidance is for schools to report grades on the 1 to 7 scale rather than convert.

A Realistic Range For Typical Grade Boundaries (With Caveats)

Students and parents reasonably want a rough sense of what a grade looks like in percentage terms. As an indicative range across many subjects in recent sessions, a grade 7 typically falls in the 80 to 100 percent range of available marks, a 6 around 70 to 79, a 5 around 60 to 69, a 4 around 50 to 59, and a 3 around 40 to 49 percent. These numbers vary substantially between subjects and sessions. Treat them as a rough mental model, not a rule.

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How Do IB Grades Compare To A-Levels And UCAS Points?

This is the single most-searched intent on this topic, and most existing pages handle it loosely. The UK Universities and Colleges Admissions Service (UCAS) publishes a tariff system that translates IB results into UCAS points, and that tariff is the reference for any IB student applying to UK universities.

The UCAS Tariff Equivalents Table (IB Points To A-Level Grades)

The table below shows commonly cited equivalents between total IB points and A-Level grade combinations, based on the UCAS tariff and published university guidance.

Total IB Points	Approximate A-Level Equivalent
45	Five A* grades at A-Level
42	Approximately four A* and one A
40	Approximately four A* grades
38	Approximately five 8-9 grades at A-Level (mix of A*/A)
36	Approximately three A grades with stronger HL performance
32	Approximately three B grades
24	Approximately three C grades (UCAS standard admission threshold)

A single Level 7 in an HL subject is treated by UCAS as equivalent to an A* at A-Level, while a Level 7 at Standard Level sits slightly above an A grade. This is why universities almost always specify HL grades in their conditional offers, not just total points.

Why Do UK Universities Often Specify HL Subject Grades, Not Just Total Points?

A Cambridge offer for Natural Sciences typically reads “40 to 42 points with 776 at HL”, meaning the university wants 7-7-6 across your three HL subjects on top of the total points target. HL subjects are where the depth of preparation for university study sits, and admissions tutors want strong performance specifically in the HL subjects relevant to your degree. Aiming for 6s and 7s in HL is the practical target for any IB student applying to competitive UK universities.

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What IB Score Do Universities Actually Want?

Target scores vary by region and by university. Here is what the current published guidance looks like across the three regions IB students from the UAE most commonly apply to.

UK Universities: Oxford, Cambridge, And Russell Group Typical Offers

Oxford and Cambridge typically issue offers in the 38 to 42 point range, with subject-specific HL requirements that almost always include 776 or 777 at Higher Level. Imperial and LSE generally sit at 38 to 39 with similar HL specifications. 

The broader Russell Group, including UCL, Edinburgh, Manchester, and Bristol, typically asks for 36 to 38 points. Other UK universities tend to set offers in the 30 to 34 point range. If Oxbridge is your target, you can read our complete guide on how to get into Oxford University.

US Universities: Why Whole-Application Review Means No Fixed Cutoff

US universities review applications across academics, essays, extracurriculars, and test scores together, and do not publish strict IB cutoffs the way UK universities do. Patterns are still clear. Ivy League and equivalent universities, such as MIT and Stanford, typically see successful applicants scoring 40 or above. Strong non-Ivy private universities such as Duke and Northwestern see the most successful IB applicants in the 38 to 42 range. 

State flagship universities accept candidates across a wider range, often from the mid-30s upwards. US universities often award college credit for HL subjects scoring 5 or higher. State flagship universities tend to accept applicants from a broader spectrum, typically starting from the mid-30s and above. In the United States, universities frequently grant college credit for HL subjects with scores of 5 or above.

UAE Universities: NYUAD, AUS, And Top Dubai Institutions

For UAE-based students staying in-region, the IB Diploma is widely accepted. NYU Abu Dhabi is the most selective and typically looks for 38 plus with strong HL grades. The American University of Sharjah, Heriot-Watt University Dubai, Middlesex University Dubai, and the University of Wollongong in Dubai accept IB Diplomas in the 28 to 34 point range, depending on the course, with competitive programmes such as medicine and engineering asking for higher. Subject-specific HL requirements apply for STEM courses across the board.

Know More About: Top Universities That Accept IB: Scores & Requirements 2026

Ignite: IBDP Tutors In Dubai Helping You Hit Your Target IB Score

At Ignite Training Institute, our IBDP tutors in Dubai work with students subject by subject across the 1 to 7 scale, with sessions designed to move students from where they currently sit to where they need to be for their university targets. 

Our programme integrates Extended Essay supervision, TOK essay drafting support, and mock-exam grade-boundary analysis as part of the core service, because the EE and TOK bonus points are often what move a student from a 37 to a 40, and from a Russell Group offer to an Oxbridge offer.

So, whether you are starting DP1 and setting realistic targets, or mid-DP2 and pushing for the last few points to clear a conditional offer, our IB tutors in Dubai can map a route that fits your subject combination and university shortlist.

FAQs

1. What Is A 7 In IB Equivalent To?

A grade 7 at HL is treated by UCAS as equivalent to an A* at A-Level. A grade 7 at SL sits slightly above an A grade. The IB does not publish an official conversion to US letter grades or 4.0 GPA scales.

2. Is A 6 In IB A Good Grade?

A grade 6 is a strong result against the published descriptors. A profile with multiple 6s and a couple of 7s typically lands in the 36 to 38 point range, opening doors to most Russell Group and many competitive US institutions.

3. What Is A 5 In IB Equivalent To?

A grade 5 represents good performance, broadly comparable to a B at A-Level for HL subjects. A profile of mostly 5s and one or two 6s typically lands in the 30 to 33 point range, meeting entry requirements for a wide range of universities globally.

4. Is 3 A Passing Grade In IB?

A grade 3 passes at the subject level, but Diploma rules limit you to no more than three 3s or below across your six subjects. More than three prevents the diploma from being awarded, regardless of your total points.

5. What Percentage Is A 7 In IB?

The IB does not publish a fixed grade-to-percentage conversion. As an indicative range, a grade 7 typically falls in the 80 to 100 percent of available marks range, but this varies between subjects and sessions.

6. How Rare Is A 45 In IB?

A perfect 45 is achieved by less than 1 percent of candidates worldwide in any session. It requires a 7 in all six subjects plus 3 bonus points, meaning at minimum an A in one core component and a B in the other.

7. When Do IB Exam Results Come Out?

May session results are released in early July. November session results are released on 16 December. Candidates access results through the IB candidates portal using credentials provided by their DP coordinator.

8. Can You Retake IB Exams?

Yes. The IB removed the three-session rule in 2023, so there is no longer a cap on the number of sessions in which you can sit IB exams to satisfy the programme.

9. Does IB Give A GPA?

No. The IB does not issue a GPA. Some schools convert IB grades into an internal GPA for transcript purposes, but this is school-specific. US universities work directly with the 1 to 7 scale.

10. What Is The Global Average IB Score?

The global average IB Diploma score in recent sessions has sat in the 29 to 31 point range. A score of 38 or above is considered strong, and 40 or above places you in the top tier worldwide.

Conclusion

IB grades work on a simple frame and a more nuanced reality. The frame is the 1 to 7 scale, six subjects, and 0 to 3 bonus points from EE and TOK, totalling a maximum of 45 points. The nuance sits in three places. IB grading is criterion-referenced rather than percentage-based, which means there is no fixed grade-to-percentage table and boundaries shift every session. 

The diploma is awarded against six conditional rules, not just the 24-point minimum, and an E in either EE or TOK is a complete blocker. And what universities ask for varies by region and by course, with HL grades mattering at least as much as total points.

If you are working toward a specific IB target and want a tutor who will map a realistic route to it, you can book a free demo class with one of our IBDP tutors. Bring your current scores, your university shortlist, and the subjects you find hardest, and we will build the plan from there.

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