High School GPA Rank Calculator
Calculate high school grade rank from raw score, average, and standard deviation.
상위 13.0% | 예상 석차 26/200명
분석 결과
등급컷 점수 참고표
등급 기준
결과 공유
Overview
The School Grade Calculator automatically determines your percentile rank and 9-tier grade by entering your raw score, class average, and standard deviation. Based on Korea's relative grading system for high school, it accurately classifies grades from Tier 1 (top 4%) to Tier 9, making it an essential tool for planning university admission strategies. Predict your subject grades in advance and manage your academic goals effectively.
Formula
Z-score = (Raw Score - Class Average) / Standard Deviation Percentile Rank = (1 - Φ(Z)) × 100 (where Φ is the standard normal CDF) Grade Tiers: Tier 1: Top 4% Tier 2: 4%–11% Tier 3: 11%–23% Tier 4: 23%–40% Tier 5: 40%–60% Tier 6: 60%–77% Tier 7: 77%–89% Tier 8: 89%–96% Tier 9: 96%–100%
How to Use
- 1Enter your raw score for the subject.
- 2Enter the class average (as shown on your report card).
- 3Enter the standard deviation (as shown on your report card).
- 4Click Calculate to view your Z-score, percentile rank, and estimated grade tier.
- 5Enter multiple subjects to also check your overall grade average.
Tips
- ✔In subjects with a small standard deviation, even a small score difference can cause a significant grade shift — prepare carefully to avoid mistakes.
- ✔Subjects with few enrolled students (e.g., second foreign languages) may have unfavorable grade distributions. Consider enrollment numbers when choosing subjects.
- ✔The boundary between Tier 1 and Tier 2 (top 4%) is very narrow, so consistently track your position through practice exams.
- ✔School grades are the most important factor in the early admission (수시) track, so systematic grade management starting from the first year of high school is crucial.
FAQ
Q. What is a grade cutoff (등급컷)?
A grade cutoff is the minimum raw score required to achieve a particular grade tier. For example, if the Tier 1 cutoff is 92, you need 92 or above for Tier 1. Cutoffs vary each exam depending on difficulty and score distribution, and can be estimated from the average and standard deviation on your report card.
Q. How is the percentile rank calculated?
The percentile rank is calculated as (class rank / total students) × 100. Using the raw score, average, and standard deviation, a Z-score is computed, then converted to a percentile via the standard normal distribution table. A lower percentile rank indicates a higher standing.
Q. What is the difference between absolute and relative grading?
Absolute grading assigns grades based on predetermined score thresholds, while relative grading distributes grades based on the overall score distribution of all students. Korean high school GPA uses relative grading (9-tier system), whereas the CSAT English and Korean History sections use absolute grading.
Q. How are school grades reflected in the early admission (수시) process?
Methods vary by university, but the subject-based track (학생부교과) generally reflects the average grade tier of core subjects (Korean, English, Math, Social Studies/Science). The comprehensive track (학생부종합) evaluates not just grades but also course difficulty, grade trends, and detailed activity records holistically.
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