IB to GPA Converter (Approximate US 4.0 Scale)
Enter your figures or complete the checklist. Results are planning estimates, not official decisions.
The International Baccalaureate (IB) Diploma uses a 1–7 scale per subject with a maximum of 45 total points, while US colleges use a 4.0 GPA scale. If you're an IB student applying to American universities, knowing your approximate GPA equivalent helps you understand where you stand competitively.
This IB to GPA Converter estimates an approximate US GPA from either your IB diploma total (out of 45) or your average subject grade (1–7). It's useful for rough comparison with US applicants, but remember that US colleges evaluate IB students holistically.
How to use this converter
- Choose input type — enter either your total IB diploma points or your average subject grade.
- Enter your score — for diploma total, enter 1–45; for subject average, enter 1.0–7.0.
- Click "Convert to GPA" to see the approximate US 4.0-scale equivalent.
Estimate an approximate US GPA (4.0 scale) from your IB diploma total or average subject grade. US colleges evaluate IB holistically — use this for rough comparison only.
Understanding your results
An IB total of 38–45 points generally corresponds to a GPA of 3.8–4.0, placing you competitively for top US universities. A score of 30–37 is roughly equivalent to 3.3–3.7, which is strong for most universities. Below 30 points translates to approximately 2.5–3.2 GPA.
Keep in mind that US colleges value the rigor of the IB curriculum — they understand that a 6 in IB Higher Level Physics represents advanced work. Many universities grant college credit for strong IB scores (typically 6–7 in HL subjects).
Frequently asked questions
Ivy League universities don't publish minimum IB requirements, but competitive applicants typically score 38–42+ total points with several 7s in Higher Level subjects. The IB diploma is just one part of a holistic review that includes essays, activities, and recommendations.
US colleges view IB and AP as equally rigorous. The IB Diploma's holistic structure (six subjects plus TOK, EE, and CAS) can be advantageous because it demonstrates breadth. Many colleges give more credit for IB HL scores of 6–7 than for AP scores of 4–5.
IB uses a 1–7 scale per subject (42 max from six subjects) plus up to 3 points from TOK and the Extended Essay, for a 45-point maximum. GPA uses a 4.0 scale averaged across all courses. IB is criterion-referenced (absolute standards), while GPA can be norm-referenced.
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How to interpret the result
Use the result to compare scenarios and identify questions. Schools, universities, testing bodies and government agencies may use different scales, rounding rules and eligibility criteria. An estimate on this page cannot override an official calculation.
Before you decide
- Read the assumptions shown beside the tool.
- Repeat the calculation with a lower and higher scenario.
- Save the official requirement that applies to your case.
- Ask the responsible institution to confirm any conversion in writing.