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AiTechWorlds
AiTechWorlds
Calculate your CGPA using the South Korea (4.5 scale). Free, instant, and built for tech & engineering students.
Your CGPA
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0 total credits · 🇰🇷 South Korea (4.5 scale)
Grade boundaries are indicative national conventions — always verify exact ranges with your own university.
To calculate CGPA in South Korea, multiply each course’s grade points by its credit hours, add them up, and divide by the total credits. South Korea universities use the South Korea (4.5 scale) (used by Seoul National University, KAIST, Yonsei University). This free calculator does it instantly — no login required.
| Grade | Grade Point | Meaning |
|---|---|---|
| A+ | 4.5 | — |
| A | 4 | — |
| B+ | 3.5 | — |
| B | 3 | — |
| C+ | 2.5 | — |
| C | 2 | — |
| D+ | 1.5 | — |
| D | 1 | Pass |
| F | 0 | Fail |
Pick your grading scale
The calculator preselects the South Korea (4.5 scale). You can switch country or build a custom scale anytime.
Add your courses
Enter each course’s credit hours and the grade you earned. Course names are optional.
Add each semester or year
Use the tabs to add every semester (or year). Each group shows its own GPA.
Read your CGPA instantly
Your credit-weighted cumulative CGPA updates live — no submit button needed.
Save or convert
Sign in to sync results to Google Drive, export JSON, or convert your CGPA to other scales.
CGPA in South Korea is credit-weighted: CGPA = Σ(grade point × credit hours) ÷ Σ(credit hours), using the South Korea (4.5 scale).
Most South Korea universities use the South Korea (4.5 scale), including Seoul National University, KAIST, Yonsei University. Exact mark boundaries can vary slightly between universities.
Yes. It is completely free, works without login, and runs entirely in your browser. Sign in only if you want to sync results across devices.
Yes. Add each semester as a separate group to see individual semester GPA, while the overall CGPA combines all of them by credit weight.
Yes. Courses with more credit hours have a bigger impact on your CGPA, which is why the calculation is credit-weighted.
Last reviewed on 2026-06-15 by the AiTechWorlds Team. All calculations run locally in your browser. All CGPA calculators.