IB Grade Calculator

What Is the IB Diploma Programme?

The International Baccalaureate Diploma Programme (IBDP) is a two-year pre-university curriculum taken by students aged 16–19 in over 150 countries. It is recognized by universities worldwide as rigorous preparation for undergraduate study. Students take six subjects — three at Higher Level (HL) and three at Standard Level (SL) — alongside three core components: Theory of Knowledge (TOK), an Extended Essay (EE), and Creativity, Activity, Service (CAS).

The IB grade calculator above lets you model your total score before results day, understand your failing condition risk, and explore how different subject grades or TOK/EE combinations affect your diploma outcome.

How IB Grading Works

Subject Grades

Each of the six subjects is graded on a scale of 1 to 7:

The maximum from six subjects is 42 points (6 × 7).

TOK and Extended Essay Bonus Points

Theory of Knowledge and the Extended Essay are each awarded a grade of A (Excellent) through E (Elementary). The combination of the two grades determines how many bonus points are added to your subject total, using this matrix:

The maximum bonus is 3 points, bringing the overall maximum to 45.

Failing Conditions

Meeting the 24-point minimum is necessary but not sufficient for the diploma. Six additional failing conditions exist:

1. Grade 1 awarded in any subject
2. Grade 2 or below in any Higher Level subject
3. Grade 3 or below in two or more Higher Level subjects
4. Grade 2 or below in two or more Standard Level subjects
5. Grade E in Theory of Knowledge or Extended Essay
6. CAS requirements not fulfilled (not detectable by a calculator — requires school confirmation)

The calculator checks conditions 1–5 automatically from your inputs.

A Worked Example

A student’s predicted grades:

TOK: C, Extended Essay: C → 1 bonus point

Subject total: 6 + 5 + 6 + 6 + 7 + 5 = 35 Bonus: +1 Total: 36 / 45

Failing conditions check: No grade 1s. No HL grade ≤ 2. Only one HL grade ≤ 3 (Physics: 5 — actually above 3). No SL grade ≤ 2. No E grade. → Diploma awarded.

IB Score Ranges and University Benchmarks

What Different Scores Mean

• 40–45: Exceptional. Top universities globally. ~5% of candidates.
• 35–39: Very strong. Competitive for most programs at selective universities.
• 30–34: Solid. Above the global average (~30–31 most years). Meets requirements for most universities.
• 24–29: Diploma awarded but below average. Sufficient for many university programs.
• Below 24: Diploma not awarded (absent other failing conditions).

University Score Requirements (Approximate)

United States: US universities focus more on individual subject grades for credit than on the total diploma score for admission. Most award credit for HL subjects graded 5+, with selective schools requiring 6 or 7 in specific subjects.

United Kingdom: IB scores are used in place of A-level requirements.

• Oxford, Cambridge: typically 38–42 points
• Imperial, UCL, LSE: typically 36–40 points
• Russell Group universities: typically 32–38 points
• Other universities: typically 28–34 points

Canada: Major universities accept IB for admission and advanced standing. UBC and McGill typically require 30–36 for competitive programs.

Australia: IB scores convert into an equivalent ATAR (Australian Tertiary Admission Rank) for local admissions comparison. A score of 45 converts to an ATAR of 99.95.

Global Average and Pass Rate

The global IB Diploma pass rate consistently sits around 79–82%. The mean total score globally is approximately 29–31 points. Both figures vary slightly year to year based on exam difficulty and grade boundaries set by the IBO after each session.

Strategies for Maximizing Your Score

Prioritize HL Subjects

Higher Level subjects offer no more points per grade than SL subjects — both max out at 7. But HL subjects carry stricter failing conditions and typically require more preparation time. Focus your study effort on HL subjects first: a grade 3 in an HL subject is far more damaging (potential failing condition) than a grade 4 in an SL.

Don’t Neglect TOK and EE

A grade C in both TOK and EE earns only 1 bonus point. Moving from C/C to B/B earns 2 points — equivalent to improving a single subject by two grades. Students who treat TOK and the Extended Essay as boxes to check often leave 1–2 points on the table. A grade A in either is achievable with focused effort on the specific assessment criteria.

Understand Grade Boundaries

IB grade boundaries shift each exam session based on the difficulty of papers and global performance. A raw score that earns a 6 in one session may only earn a 5 in another. Predicted grades from your school are estimates. The calculator uses whole-number grades — treat results as planning tools, not guarantees.

Track Failing Conditions Proactively

Most students focus on total points and underestimate failing condition risk. Run the calculator with your current predicted grades to identify which conditions are closest to triggering. A student with a predicted 2 in an HL subject should prioritize that subject above all others regardless of their total score.

Key Assumptions and Limitations

This calculator implements the standard IB Diploma grading rules for the Diploma Programme. It does not account for: school-based assessment moderation (which can adjust final grades from predicted grades), bilingual diploma requirements, retake session rules, or CAS completion (which must be verified by your school coordinator). Grade boundaries vary each session — this calculator uses your entered grades directly and does not predict grade boundary adjustments. For official results, always refer to the IBO’s published grade results.