IB to GPA Calculator
Enter your IB total points directly, or build your total from six subject grades plus TOK/EE core points.
Optional: If you do not know your total yet, fill subject scores below and leave total blank.
How this IB to GPA calculator works
This tool converts your International Baccalaureate score into an estimated GPA using common IB score conversion approaches. Because there is no single worldwide standard for turning IB diploma points into GPA, the calculator gives you multiple methods.
- Linear method: anchors 24 IB points to a 2.0 GPA and 45 points to a 4.0 GPA.
- Percentage-style method: treats IB as a simple fraction of 45 points.
- Admissions estimate: a smoother, piecewise model based on common U.S. admissions interpretation.
IB score to GPA: quick reference
| IB Total Points | Estimated GPA (4.0 scale) | Typical Interpretation |
|---|---|---|
| 24 | ~2.0 to 2.5 | Diploma threshold / baseline passing level |
| 30 | ~2.6 to 3.0 | Solid academic profile |
| 36 | ~3.1 to 3.5 | Strong performance |
| 40 | ~3.5 to 3.8 | Highly competitive |
| 42+ | ~3.7 to 4.0 | Top-tier achievement |
When to use each conversion method
1) Linear (24 to 45 mapped to 2.0 to 4.0)
Good for quick planning when you want a middle-ground estimate. It reflects the fact that many institutions view the IB diploma threshold differently from a zero-point floor.
2) Percentage-style
Useful when you want a straightforward formula. It is easy to understand and compare, but can slightly understate higher IB scores at some schools.
3) Admissions estimate
Helpful when you want a result that behaves more like real admissions reading, where moving from 40 to 44 can matter differently than moving from 24 to 28.
How to calculate IB points if you only have subject grades
If your final IB diploma points are not available yet, you can still estimate your GPA:
- Enter six subject grades (each from 1 to 7).
- Add TOK/EE core points (0 to 3).
- Let the calculator total everything and convert to GPA.
This is especially useful for predicted IB grades, early applications, and scholarship planning.
FAQ: IB diploma to GPA conversion
Is there an official universal IB to GPA scale?
No. Colleges, states, and credential services may each apply different policies.
Can I report this GPA directly on applications?
Usually, you should report your official IB scores and transcript data exactly as issued. Use this calculator as an estimate for planning and benchmarking.
Do Higher Level (HL) courses get extra GPA weight here?
This calculator converts your total IB performance. Some schools separately apply weighted GPA logic and may value HL rigor in their own review system.
Final tip
For the best admissions strategy, pair your estimated GPA with context: HL course rigor, internal grades, extended essay quality, and predicted scores. A strong IB profile is more than a single number.