CGPA Calculator

What is a CGPA calculator?

A CGPA calculator computes your Cumulative Grade Point Average — the credit-weighted average of your grade points across all subjects or semesters — and converts it into a percentage. Instead of averaging marks, it averages the grade points (typically on a 10-point scale) that each subject earns, with subjects carrying more credits counting more heavily toward the final number.

CGPA is the standard way schools and universities summarise academic performance in a single figure. This tool also applies the most common percentage conversion so you can quote your score in either format on applications and resumes.

How is CGPA calculated?

CGPA is the sum of each subject’s grade point multiplied by its credits, divided by the total credits. The exact formula this calculator uses is:

CGPA = Σ(grade point × credits) ÷ Σ credits

To convert to a percentage, the tool applies the common CBSE rule:

Percentage = CGPA × 9.5

If you leave the credits off a line, that subject is treated as 1 credit, so every grade point is weighted equally and the CGPA becomes a plain average. The result is shown to two decimal places, the percentage to one decimal place.

Worked examples you can reproduce

Here are two examples that match the calculator’s output exactly.

Example 1 — credit-weighted (different credits). Suppose you have four subjects entered as 9 4, 8 3, 7 3, 10 2:

• Weighted points: (9×4) + (8×3) + (7×3) + (10×2) = 36 + 24 + 21 + 20 = 101
• Total credits: 4 + 3 + 3 + 2 = 12
• CGPA = 101 ÷ 12 = 8.42
• Percentage = 8.42 × 9.5 ≈ 80.0%

Example 2 — equal weighting (no credits). Enter four grade points with no credits: 8, 9, 7, 10. Each counts as 1 credit:

• Sum of grade points = 8 + 9 + 7 + 10 = 34
• Total credits = 4
• CGPA = 34 ÷ 4 = 8.50
• Percentage = 8.50 × 9.5 = 80.8%

Notice that Examples 1 and 2 use the same numbers but give different CGPAs — that is the effect of credit weighting. The 7 in Example 1 carries 3 credits and drags the average down more than it does when every subject is weighted equally.

CGPA to percentage conversion table

Using the ×9.5 formula, here is a quick reference on the 10-point scale:

CGPA	Percentage (×9.5)	Indicative band
10.0	95.0%	Outstanding
9.5	90.3%	Outstanding
9.0	85.5%	Excellent
8.5	80.8%	Very good
8.0	76.0%	Very good
7.5	71.3%	Good
7.0	66.5%	Good
6.5	61.8%	Average
6.0	57.0%	Average
5.0	47.5%	Pass

SGPA vs CGPA — what’s the difference?

SGPA (Semester Grade Point Average) covers one semester only, while CGPA is cumulative across every semester you have completed. They use the same credit-weighted method; the only difference is the set of subjects included.

To roll several semesters into a CGPA, weight each semester’s SGPA by its total credits:

CGPA = Σ(SGPA × semester credits) ÷ Σ semester credits

For example, if Semester 1 was SGPA 8.0 over 20 credits and Semester 2 was 9.0 over 22 credits: CGPA = (8.0×20 + 9.0×22) ÷ (20 + 22) = (160 + 198) ÷ 42 = 358 ÷ 42 ≈ 8.52. You can reproduce this in the tool by entering 8 20 and 9 22.

Real-world uses

• Applications and resumes — report a single performance figure, plus the percentage many employers and forms still expect.
• Higher-studies eligibility — quickly check whether you clear a CGPA cut-off for honours, scholarships, or postgraduate admission.
• What-if planning — add a hypothetical grade for an upcoming exam to see how it would move your CGPA before results are out.
• Cross-board comparison — translate a CGPA into a percentage to compare with peers graded on a marks system.

For a tool that handles term-based marks in percentage form, see the percentage calculator. You can browse more study tools on the education category page, including the CGPA-friendly chronological age calculator for application forms.

Tips and common mistakes

• Use a consistent scale. This calculator assumes grade points on the same scale (commonly 0–10). Mixing a 4.0 GPA value with 10-point grade points will give a meaningless average.
• Don’t forget credits. Omitting credits gives every subject equal weight, which can differ from your official CGPA if your subjects actually carry different credit hours.
• Round only at the end. Keep full precision while adding, then round the final CGPA — rounding each subject early introduces error.
• Failed papers count. A backlog usually enters as a 0 until cleared, lowering your CGPA; re-entering it after a re-sit raises it.

Limitations and accuracy notes

This tool is an estimator for personal planning. The ×9.5 conversion is the CBSE rule and is widely quoted, but percentage conversion formulas differ by university — common alternatives include (CGPA − 0.75) × 10 and (CGPA − 0.5) × 10, and some institutions publish their own grade-to-point mapping. The figure here will not always match your official transcript or marksheet.

Always confirm your grading scale, credit values, and the exact conversion formula with your institution before using a number for any official purpose. If you are converting a GPA from a 4.0 scale, convert it to the 10-point scale first, then apply this calculator.