CGPA Calculator
Calculate your CGPA and convert it to percentage for all major grading systems.
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CGPA Calculator
Use the formula and worked example below to calculate manually.
Overview
The CGPA calculator computes your Cumulative Grade Point Average from semester-wise grades or individual subject grades, and converts the result to a percentage using standard conversion formulas.
How to use this calculator
- Enter each subject's grade points and credit hours.
- Add as many subjects as needed.
- The calculator shows your CGPA and the equivalent percentage using the CBSE/university formula.
Understanding the inputs & results
Grade Point (GP)
A numerical value assigned to a letter grade — e.g., O=10, A+=9, A=8 (10-point scale).
Credit hours
The weight assigned to each subject, reflecting its study hours per week.
CGPA
Cumulative Grade Point Average — the weighted average of grade points across all subjects.
Percentage equivalent
CGPA × 9.5 (CBSE formula) or CGPA × 10 − 7.5 (some universities) to convert to percentage marks.
The formula
CGPA formula
CGPA = Σ(Grade Point × Credits) / Σ(Credits) | % = CGPA × 9.5
Multiply each subject's grade point by its credits, sum all, then divide by total credits. Multiply by 9.5 for the CBSE percentage equivalent.
Worked example
Three subjects: Math (9 GP, 4 credits), Physics (8 GP, 4 credits), English (7 GP, 2 credits).
- Weighted sum = (9×4) + (8×4) + (7×2) = 36 + 32 + 14 = 82.
- Total credits = 4 + 4 + 2 = 10.
- CGPA = 82 / 10 = 8.2.
- Percentage = 8.2 × 9.5 = 77.9%.
✓ CGPA = 8.2, equivalent to approximately 77.9%.