CSAT Grade Calculator (수능 등급 계산기)
Convert CSAT percentile to the 9-grade scale (등급컷).
Overview
The Korean CSAT (수능) reports each subject on a nine-grade scale defined by fixed percentile cut-offs rather than by raw marks. Grade 1 is the top 4 percent of test takers, grade 2 the next 7 percent to a cumulative 11, then 23, 40, 60, 77, 89 and 96 percent, with grade 9 covering the bottom 4 percent.
Your Grade (등급)
Grade Cutoff Table (등급컷 기준표)
| Grade | Percentile Range | Proportion | Cumulative |
|---|---|---|---|
Notes (참고사항)
- The 9-grade system divides test-takers using fixed percentage cutoffs
- Grade boundaries are determined by the proportion of test-takers, not by raw scores
- This system applies to: Korean, Math, English, Korean History, Social/Science subjects
- English uses absolute grading (절대평가) since 2018 CSAT
How to Use
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1
Enter your values
Type your numbers into the CSAT Grade Calculator (Korea) input fields.
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2
Adjust the options
Choose the units, method, or region that fits your situation, or apply a quick preset.
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Read the result instantly
The result updates as you type — no submit button, and nothing is sent to a server.
About
Because the boundaries are proportions of the cohort, the raw score required for a given grade moves with question difficulty every year. A hard paper lowers the grade-1 cut-off and an easy one raises it, which is why year-on-year comparison of raw marks carries no information about relative performance.
The design compresses the middle of the distribution and stretches the tails: grades 4 and 5 each span twenty percentile points, while grade 1 spans four. A candidate near a boundary can move a full grade on a single question, and admissions formulas that weight grades rather than percentiles amplify that discontinuity.