CGPA Calculator (10-Point Scale) with Percentage Converter

About this CGPA Calculator

This calculator works out your cumulative grade point average on the 10-point scale widely used by Indian colleges and universities. You list each subject, pick its grade (O, A+, A, B+, B, C, P or F) and enter its credits. The page multiplies, adds and divides for you, then shows your CGPA and an estimated percentage.

It is meant for engineering, science, commerce and arts students who have a grade card full of letters and credits but no single number to quote. It also suits parents checking a result, and anyone filling an application form that asks for both CGPA and percentage. You can enter one semester or the whole degree.

People usually come to it at three moments: right after results are declared, when they want to know where they stand; before a placement or higher-study application, when a percentage is needed; and mid-degree, when they want to plan how much they must score in the remaining semesters to reach a target such as 8.0 or 8.5.

How to use the CGPA Calculator, step by step

1. Add one row per subject. Start with the rows already shown and press the add button for each extra subject. Fill the Subject name field with anything that helps you recognise the row, such as Digital Electronics or Physics Lab.
2. Pick the grade from the dropdown. Choose the letter on your grade card in the grade field. The calculator turns it into points: O is 10, A+ is 9, A is 8, B+ is 7, B is 6, C is 5, P is 4 and F is 0.
3. Enter the credits. Type the credit value of the subject in the Credits field. You will find it on your syllabus or marksheet. Labs often carry 1 or 2 credits and theory papers 3 or 4. Do not leave it blank.
4. Read the CGPA and percentage. The CGPA appears as soon as any field changes, rounded to two decimals. Below it you will see the estimated percentage, which this page works out as CGPA multiplied by 9.5.
5. Combine semesters in one list. To get a full-degree CGPA, add every subject from every semester to the same list. The credit weighting means one long list gives the right answer, with no need to average semesters by hand.
6. Test what-if grades. Change a grade or a credit value to see its effect at once. Try swapping an F for a P to see how much clearing a backlog could lift your result, then compare with your university rules.

The formula behind the CGPA Calculator

CGPA is a credit-weighted average of grade points. The percentage shown on this page is an estimate made by multiplying the CGPA by a fixed factor.

CGPA = Σ(Grade Point × Credits) ÷ Σ(Credits)
CGPA from SGPAs = Σ(SGPA × Semester Credits) ÷ Σ(Semester Credits)
Percentage ≈ CGPA × 9.5

What each symbol means

Grade Point

The number attached to a letter grade: O = 10, A+ = 9, A = 8, B+ = 7, B = 6, C = 5, P = 4, F = 0

Credits

The weight of a subject, taken from your syllabus or grade card

Σ

Sum: add the quantity over every subject, or every semester

SGPA

Semester grade point average, the credit-weighted average for one semester

Semester Credits

Total credits registered in that semester

9.5

The multiplier this page uses to estimate percentage; it matches the CBSE rule but is not universal

How the formula works

The weighting exists because subjects are not equal. A 4-credit theory paper represents more teaching hours and more work than a 1-credit lab. If you simply averaged grade points, a single lab grade of 10 would pull your result as hard as a core paper graded 6. Multiplying each grade point by its credits first gives every subject a vote in proportion to its size. Dividing by total credits at the end turns the pile of points back into an average on the familiar 0 to 10 range.

Going from SGPA to CGPA follows the same logic one level up. Each SGPA is already an average, so you must not average the averages unless every semester had the same credits. Multiply each SGPA by its semester credits to recover that semester's total points, add the totals, and divide by all credits. If your semesters carried 22, 24, 26 and 24 credits, the difference from a plain average is small but real, and it grows when one semester is much heavier than the others.

The percentage is a different kind of number. CGPA is an average of grade points, while a percentage is a share of marks, so no law of mathematics links them. Institutions simply publish a conversion rule. CBSE uses CGPA × 9.5. Some institutions use CGPA × 10. VTU uses (CGPA − 0.75) × 10 for its own scheme. The same 8.34 therefore becomes 79.23%, 83.40% or 75.90%. Use the formula printed by your university whenever the number goes on an official document.

Failed subjects are where universities differ most, so this page keeps the rule simple. An F carries 0 grade points and its credits stay in the denominator, which pulls the CGPA down. Many institutions let a cleared backlog replace the old grade, some average the attempts, and some cap the new grade. The calculator cannot know your rule, so enter the grades you want counted and treat the outcome as a planning figure until you confirm the policy in your rulebook.

Worked examples

From four SGPAs to a degree CGPA

Kavya has finished four semesters. Her SGPAs were 8.2, 8.8, 7.9 and 9.1, with 22, 24, 26 and 24 credits respectively. She wants her CGPA and an estimated percentage.

1. Points per semester: 8.2 × 22 = 180.4; 8.8 × 24 = 211.2; 7.9 × 26 = 205.4; 9.1 × 24 = 218.4.
2. Total points = 180.4 + 211.2 + 205.4 + 218.4 = 815.4.
3. Total credits = 22 + 24 + 26 + 24 = 96.
4. CGPA = 815.4 ÷ 96 = 8.49375, which rounds to 8.49.
5. Estimated percentage = 8.49375 × 9.5 = 80.69%. A plain average of the four SGPAs would give 8.50, so the weighting changes the third digit.

Result: CGPA 8.49 and about 80.69% using the 9.5 factor.

How a backlog moves the CGPA

Rohit took six subjects in one semester: Engineering Maths 8 (4 credits), Data Structures 7 (4), Digital Electronics F (3), Economics 9 (3), Physics Lab 10 (2) and Communication 6 (2). He wants to see the effect of clearing Digital Electronics later.

1. Points with the F counted as 0: 32 + 28 + 0 + 27 + 20 + 12 = 119.
2. Total credits = 4 + 4 + 3 + 3 + 2 + 2 = 18, so CGPA = 119 ÷ 18 = 6.61.
3. If he clears the subject with P (4 points): 3 × 4 = 12, so points become 131 and CGPA = 131 ÷ 18 = 7.28.
4. If he clears it with B+ (7 points): 3 × 7 = 21, so points become 140 and CGPA = 140 ÷ 18 = 7.78.
5. The credits stay at 18 in every case, so only the numerator changes. This assumes the new grade replaces the F, which not every university does.

Result: CGPA is 6.61 with the F, 7.28 after a P and 7.78 after a B+.

Same CGPA, three different percentages

Meera has a CGPA of 8.34 and needs a percentage for three different forms. One follows the CBSE-style rule, one uses a plain multiply-by-10 rule, and one uses the VTU formula.

1. CGPA × 9.5: 8.34 × 9.5 = 79.23%.
2. CGPA × 10: 8.34 × 10 = 83.40%.
3. VTU formula: (8.34 − 0.75) × 10 = 7.59 × 10 = 75.90%.
4. The gap between the highest and lowest answer is 83.40 − 75.90 = 7.50 percentage points, from one grade card.
5. Which one is right depends on who asks. A form from a particular university or employer normally names the formula, or accepts the one printed on your degree documents.

Result: 79.23%, 83.40% or 75.90%, depending on the conversion rule required.

Reference tables

CGPA to percentage under three common rules

Values below are computed with each formula exactly as written. The first column is the rule this calculator uses. Check which rule your institution accepts before quoting any of them.

SGPA needed in the next four semesters to reach a target CGPA

This table assumes eight equal semesters of 24 credits each (192 in total), with 96 credits already done. Read across from your current CGPA to the target to see the average SGPA you need in the remaining four semesters. Real credit loads vary, so use it as a guide.

Common mistakes and tips

Do not average SGPAs blindly

A plain average of SGPAs is only correct when every semester had the same credits. When credits differ, weight each SGPA by its credits first. In the Kavya example the gap is small, but with a light final semester it can reach a few hundredths.

Round once, at the end

Keep full decimals through the working and round only the final CGPA. If you round the CGPA to 8.49 and then multiply by 9.5 you get 80.66%, while the unrounded value gives 80.69%. Neither is official; the university's published figure is.

Enter credits, not hours

Credits are the number on your grade card or syllabus, not weekly class hours. A lab with three hours a week might still carry 1.5 or 2 credits. Copy the figure from the document, since the wrong weight shifts the answer.

Check how your university treats a backlog

Replacement, averaging and capped grades are all in use somewhere. Before you rely on a post-backlog CGPA, find the clause in your examination rules, then enter the grade that clause says will count.

Do not trust one factor everywhere

9.5 is a CBSE-style rule, and other institutions publish their own. If an employer or admissions portal asks for a percentage, use the rule on your university certificate or ask the examination office for a written conversion.

Mind the ceiling

Under the 9.5 rule a perfect 10 CGPA converts to 95%, not 100%. That surprises people who expect the two scales to meet at the top. It is a feature of the rule itself, not a calculator error.

Where people use this calculator

Checking results the day they come out

Grade cards list letters and credits but rarely a clean CGPA. Entering them takes a minute and tells you whether you cleared a milestone such as 7.5 or 8.0, which many colleges use as an eligibility line for placements.

Filling application forms

Job portals and postgraduate forms often ask for CGPA, scale and percentage in separate boxes. Use the CGPA here, then convert with the rule your university prints, and keep the grade card handy in case a recruiter asks for proof.

Planning the remaining semesters

If you are on 7.5 after four semesters and want 8.0, the target table above shows you need an average SGPA of 8.5 later. Seeing the number early helps you choose electives and study time with a clear goal.

Weighing a retake

Before paying an exam fee for a retake, test the new grade in the calculator. A jump from 4 to 7 points on a 3-credit subject in an 18-credit semester lifts the CGPA by about half a point, which tells you whether the effort pays.

Comparing your own semesters

Add each semester as a separate list, note the CGPA each time and see where you improved or slipped. The pattern often shows that one heavy semester, not general effort, caused a dip.

Frequently asked questions

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Results are estimates for general information. See our disclaimer and about page for how we build and check these tools.

Last reviewed: October 2026. Spotted a mistake? Tell us on the contact page.