CalcHub
Free Study CalculatorAs of 2026
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Here are 5 free calculators for both exam takers and college students.
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Study Calculator Usage Guide
You can instantly perform various study-related calculations, ranging from school GPA and mock exam percentile ranks to university GPA averages.
GPA Standards (2026)
Grade 1: Rank percentile 4% or lower
Grade 2: Over 4% ~ 11% or less
Grade 3: Over 11% ~ 23% or less
Grade 4: Over 231 TP3T ~ 401 TP3T or less
Grade 5: Over 40% ~ 60% or less
Grade 6: Over 601 TP3T ~ 771 TP3T or less
Grade 7: Over 771 TP3T ~ 891 TP3T or less
Grade 8: Over 891 TP3T ~ 961 TP3T or less
Grade 9: Exceeds 96%
Grade 2: Over 4% ~ 11% or less
Grade 3: Over 11% ~ 23% or less
Grade 4: Over 231 TP3T ~ 401 TP3T or less
Grade 5: Over 40% ~ 60% or less
Grade 6: Over 601 TP3T ~ 771 TP3T or less
Grade 7: Over 771 TP3T ~ 891 TP3T or less
Grade 8: Over 891 TP3T ~ 961 TP3T or less
Grade 9: Exceeds 96%
GPA 4.5 Conversion Table
A+ 4.5 · A0 4.0 · B+ 3.5 · B0 3.0
C+ 2.5 · C0 2.0 · D+ 1.5 · D0 1.0 · F 0.0
C+ 2.5 · C0 2.0 · D+ 1.5 · D0 1.0 · F 0.0
CSAT percentile ranks are different from standard scores and percentiles. Internal school grades may vary depending on the tie-breaking criteria.
Frequently Asked Questions
What are the criteria for a Grade 1 in school grades?
Grade 1 in internal school grades is a percentile rank of 4% or lower. It is calculated by considering the total number of students and the number of students with the same rank, using the formula (Rank + Number of students with the same rank – 1) ÷ Total number of students × 100.
What is the maximum GPA for university?
Korean universities primarily use a 4.5 or 4.3 scale. This calculator uses the 4.5 scale (A+ = 4.5).
How is the CSAT D-DAY calculated?
If you enter the CSAT date into the D-Day calculator, it automatically calculates the number of remaining days from today. The 2026 academic year CSAT is on November 13, 2025.