IB to GPA Calculator
Enter your six IB subject grades (1-7), then add your TOK/EE core points (0-3). This tool gives multiple GPA estimates so you can compare conversion styles.
What this GPA IB calculator does
If you are in the International Baccalaureate Diploma Programme, one of the most common questions is: “What does my IB score look like as a GPA?” This calculator helps you estimate that quickly. It uses three practical conversion approaches so you can see how your profile might appear in different contexts.
You enter six IB subject grades plus your core points from Theory of Knowledge and Extended Essay. Then the calculator returns your total points, multiple GPA estimates, and a quick interpretation band.
Why there is no single “official” IB-to-GPA conversion
Different schools, districts, and universities convert IB results in different ways. Some admissions offices never convert at all—they read your transcript directly in IB context. Others convert grades to a local GPA scale, and many use internal formulas that are not publicly shared.
- Some systems emphasize total points out of 45.
- Some focus only on the six subjects (42-point basis).
- Some convert each course grade separately and average them (course-based GPA).
Because of this, your “converted GPA” is always an estimate. It is useful for planning, but your final evaluation depends on the institution reviewing your application.
How this calculator estimates GPA
1) Linear conversion from 45 points
This method uses your complete diploma score including core points. The formula is: GPA = (IB total / 45) × 4.0. It is simple and easy to interpret.
2) Linear conversion from 42 points
This method ignores TOK/EE core points and looks at subjects only: GPA = (Subject total / 42) × 4.0. Some schools prefer this because it compares classroom performance directly.
3) Course-based mapping
This converts each 1-7 grade to a 4.0-style value and averages the six classes: 7→4.0, 6→3.7, 5→3.3, 4→2.7, 3→2.0, 2→1.0, 1→0.0. This resembles transcript-style class averaging used in many U.S. contexts.
Quick reference (linear 45-point view)
| IB Total | Approx GPA (4.0) | Approx GPA (5.0) |
|---|---|---|
| 45 | 4.00 | 5.00 |
| 40 | 3.56 | 4.44 |
| 36 | 3.20 | 4.00 |
| 32 | 2.84 | 3.56 |
| 28 | 2.49 | 3.11 |
| 24 | 2.13 | 2.67 |
How to use your result wisely
- For self-tracking: compare your result month-to-month as predicted grades change.
- For applications: check each university’s IB policy first before relying on conversion values.
- For scholarships: confirm whether they require weighted GPA, unweighted GPA, or IB points directly.
Common mistakes students make
- Using one online conversion as if it is universally accepted.
- Ignoring course rigor and HL/SL context in admissions review.
- Forgetting that predicted grades and final grades can differ significantly.
- Comparing GPA estimates across countries without checking local grading standards.
FAQ
Does this calculator replace my school transcript?
No. It is an estimation tool for planning and understanding. Official evaluation is done by your school or admissions office.
Should I include core points?
Use both views when possible. Including core points reflects full diploma performance, while excluding them isolates your six subject outcomes.
Can a university recalculate my GPA anyway?
Yes. Many institutions recalculate academic metrics internally based on their own policies, required courses, and application rules.
Tip: Save your latest predicted grades and test multiple scenarios (optimistic, realistic, conservative). This makes target-setting much clearer before exam season.