How to Calculate CGPA from Marks
A Marks to CGPA Calculator converts your raw academic marks into a Grade Point Average using your institution's specific grading scale (commonly 10.0 or 4.0).
CGPA = Sum of all GPAs ÷ Number of Subjects
Example (Scale 10): Scoring 85/100 gives a GPA of 8.5.
Convert Marks to CGPA
What Is a Marks to CGPA Calculator?
A marks to cgpa calculator helps students convert their numeric marks (like 85/100) into a cumulative grade point average (CGPA) using a standardized grading scale. This is essential if your institution reports grades using CGPA rather than percentage marks or if you need to submit GPA to admissions, internships, or employers.
Most common conversions use a 10-point scale (popular in India/South Asia) or a 4.0-point scale (US standard). This tool handles both dynamically.
How to Calculate CGPA from Marks (Step-by-Step)
Step 1: Understand Your Scale
Before calculating, confirm if your university uses a 10.0 scale, 5.0 scale, or 4.0 scale.
Step 2: Subject-Wise Formula
The core logic is proportional conversion:
GPA = (Marks Obtained ÷ Max Marks) × Scale
Example (Scale 10): 88/100 = 0.88 × 10 = 8.8 GPA.
Step 3: Average Calculation
Add all subject GPAs and divide by the number of subjects (for unweighted systems) to get your final CGPA.
Conversion Tables (10-Point Scale)
This table reflects a standard conversion used by many universities:
| Marks Range (%) | Grade Point (Scale 10) | Letter Grade |
|---|---|---|
| 90 – 100 | 10.0 | O (Outstanding) |
| 80 – 89 | 9.0 – 9.9 | A+ |
| 70 – 79 | 8.0 – 8.9 | A |
| 60 – 69 | 7.0 – 7.9 | B+ |
| 50 – 59 | 6.0 – 6.9 | B |
| Below 50 | < 6.0 | Re-Appear |
How to Convert Total Marks to CGPA?
If you only have your aggregate score (e.g., 450/500), use the "Total Marks" tab above.
- Formula: (Total Obtained / Grand Total) × Scale.
- Example: 420/500 on Scale 4.0
= (420/500) × 4.0 = 0.84 × 4.0 = 3.36 CGPA.
Student Tips for Using This Tool
- Know your grading scale: Some universities subtract 0.5 or 0.75 from the scaled value (like the CBSE 9.5 rule). This calculator uses a direct linear scale for universal applicability.
- Check Credit Weightage: If your subjects have different credits, use our SGPA to CGPA Calculator for weighted averages.
- Cross-verify: Always check your university handbook for specific rounding rules or bonus points.
Frequently Asked Questions
Divide your marks obtained by the maximum possible marks for that subject, then multiply the result by your grading scale (e.g., 10 or 4). Repeat for all subjects and average the results.
The universal formula is: (Obtained Marks / Total Marks) × Scale. For example, 80/100 on a 10-point scale results in a GPA of 8.0.
No. CGPA is a grade point average (usually out of 4 or 10), while percentage is a raw score out of 100. You can convert CGPA to percentage using specific multipliers (like 9.5 for CBSE).