IB to GPA
Calculator
Convert your International Baccalaureate (1-7) scores into a standard US 4.0 scale GPA. See both your unweighted and weighted averages instantly.
Your IB Courses
Unweighted US GPA
Standard 4.0 Scale
Weighted US GPA
+1.0 for HL, +0.5 for SL
How IB converts to US GPA
Because the International Baccalaureate (IB) program is extremely rigorous, US high schools heavily weight IB classes. Standard Level (SL) classes typically receive a +0.5 point bump (similar to Honors classes), while Higher Level (HL) classes receive a +1.0 point bump (similar to AP classes).
| IB Score | US Letter | Unweighted | Weighted (HL) |
|---|---|---|---|
| 7 or 6 | A / A+ | 4.0 | 5.0 |
| 5 | B+ | 3.3 | 4.3 |
| 4 | B- | 2.7 | 3.7 |
| 3 | C | 2.0 | 3.0 |
Frequently Asked Questions
How are IB scores converted to a US GPA?
In the standard US conversion model, an IB score of 6 or 7 is equivalent to an A (4.0). A 5 is a B+ (3.3), a 4 is a B- (2.7), a 3 is a C (2.0), and anything lower is typically a D or F.
Do IB classes boost your GPA?
Yes, significantly. Because the IB curriculum is incredibly rigorous, most US high schools 'weight' IB classes. Generally, a Standard Level (SL) class gets a +0.5 point boost, while a Higher Level (HL) class gets a full +1.0 point boost (making an A worth 5.0 instead of 4.0).
Is an IB score of 5 good?
Yes. An IB score of 5 generally translates to a B+ in the US system. Because of the difficulty of the IB exams, many colleges consider a 5 to be a strong indicator of college readiness, and some universities will even grant college credit for HL exams with a score of 5 or higher.
How do colleges view the IB Diploma?
US College Admissions officers view the full IB Diploma program as one of the most rigorous high school curricula available in the world. Even if your unweighted GPA is slightly lower than a student taking standard classes, colleges will heavily favor your application because of the rigor of the IB program.