IB to GPA Calculator
CAS Points (optional)
IB awards up to 3 bonus points for Creativity, Activity, and Service. Each point adds 0.05 to the weighted GPA.
Subject 1
Subject 2
Subject 3
Subject 4
Subject 5
Subject 6
IB Score to GPA Conversion Chart
| IB Score | Unweighted GPA | SL GPA | HL GPA |
|---|---|---|---|
| 7 | 4.00 | 4.00 | 4.33 |
| 6 | 3.70 | 3.67 | 4.00 |
| 5 | 3.30 | 3.33 | 3.67 |
| 4 | 3.00 | 3.00 | 3.33 |
| 3 | 2.70 | 2.67 | 3.00 |
| 2 | 2.30 | 2.33 | 2.67 |
| 1 | 2.00 | 2.00 | 2.33 |
Most US universities use the unweighted column. The weighted SL/HL columns reward the extra rigour of Higher Level courses, capped at 4.33.
How to Use This Calculator
Step 1: For each IB subject, choose SL or HL and select your score from 1 to 7.
Step 2: (Optional) Enter your CAS bonus points (0-3) earned for Theory of Knowledge and the Extended Essay.
Step 3: Tick "Show subject name fields" if you want to label each subject.
Step 4: Add more subjects if needed (most IBDP students take 6).
Step 5: Click "Convert to GPA" to see both unweighted and weighted GPA values.
Unweighted GPA = Average of converted IB scores using the standard 4.0 chart
Weighted GPA = Average of SL/HL converted scores + (CAS × 0.05), capped at 4.33
About the IB to GPA Calculator
The International Baccalaureate Diploma Programme (IBDP) grades each subject on a 1-7 scale, while most American universities use a 4.0 GPA scale. Because the two systems differ in rigour and structure, converting between them is not a single fixed formula. This tool uses the two most widely accepted conversion charts so you can present your IB results in a form admissions officers understand.
The unweighted GPA is the most commonly used by US universities and treats SL and HL equally. The weighted GPA gives Higher Level subjects extra credit and adds your CAS bonus points, reflecting the additional academic challenge of a full IB Diploma.
Keep in mind that GPA is only one part of an application. Universities also review SAT/ACT scores, essays, recommendations, and extracurricular achievements. If you are still in the predicted-grades stage, work with your IB coordinator to make sure your predicted scores closely match your eventual final results.
Need a different conversion? Try the GPA to Percentage Converter or the GPA Calculator.