Having problem in filling my GPA on common app as I am Indian student.

US High Schools do not have a credit system so that is a misconception. What most US High Schools have is a point/unit system where 1 full-year class counts for 1 point or 1 unit. The number of classes one HS student takes can vary from 6-8 classes per school year so if you take 8 classes per year that would be 32 points or 32 units. Often minimum graduation requirements are below the maximum so for this example it might be 24 units. Therefore such a student would have to take 6 classes per year for 4 years in order to graduate with a high school diploma. Each class you take earns you a grade in the US. That grade can be either a Letter Grade, a Percentile Grade, or in some rare times a Pass/Incomplete(Fail) grade (during COVID-19 pandemic, most US students received a Pass/Incomplete(Fail) grade). For the most part, the letter grades are most common and they are based on the 4.0 GPA Grade point average scale as shown below.

Letter Grade / Percent Grade /4.0 Scale

A+ /97-100 / 4.0

A /93-96 /4.0

A- /90-92 /3.7

B+ /87-89 /3.3

B /83-86 /3.0

B- /80-82 /2.7

C+ /77-79 /2.3

C /73-76 /2.0

C- /70-72 /1.7

D+ /67-69 /1.3

D /60-66 /1.0

F /Below <60 /0.0

So when the common app asks for your GPA, most people have one to copy from their transcript. The most common GPA is recorded on a 4.0 Unweighted scale so the range is between say 1.0 and 4.0 with a 4.0 being a perfect academic record. From the Table I copied from CollegeBoard who administers the SAT and AP tests, you can see that if you received mostly As and A+s you would have a 4.0 or perfect GPA. However perfect GPA of 4.0 doesn't mean your percentile average is 100.00% That is for argument's sake impossible.

For purposes of this response, I'm not going to cover Weighted GPAs at all because you most likely do not have any APs classes or IB classes to record. If you did, you typically get some kind of weighted boost on your 2nd GPA called the Weighted GPA. This is why some Americans have high GPAs above a 4.0.

The caveat to the collegeboard table is that some high schools have a simpler version of the grade table which looks like this. This means that a 90.00-100 is an A or 4.0, and a 80-89.99 is a B or 3.0.

Letter Grade / Percent Grade /4.0 Scale

A+ /97-100 / 4.0

A /93-96 /4.0

A- /90-92 /4.0

B+ /87-89 /3.0

B /83-86 /3.0

B- /80-82 /3.0

C+ /77-79 /2.0

C /73-76 /2.0

C- /70-72 /2.0

D+ /67-69 /1.0

D /60-66 /1.0

F /Below <60 /0.0

On the common app, you can either enter your Weighted or Unweighted GPA on a different scale or enter your percentile on a 100 scale. It's at the very bottom of the drop-down window. That's what I recommend you do. So if your cumulative percentile is 91.26% then enter that and click 100 as the scale.

This is just for those Indian students that want to know how to use the table. If you have 25 classes on your transcript and they are letter grades. Say you have 11 As, 9Bs, and 5cs, you'd calculate your GPA by the following formula

(11(4.0)+9(3.0)+5(2.0))/25 =

(44+27+10)/25=

(81)/25= 3.24 Unweighted GPA

Let's say your grading was more granular and you had 5 A+s, 5As, 1A-, 7B+,2Bs,4C+,1C, then your GPA would be

((54.0)+(54.0)+(13.7)+(73.3)+(23.0)+(42.3)+(12.0))/25

(20+20+3.7+23.1+6+9.2+2)/25

84/25=3.36 Unweighted GPA

So use whichever table benefits your actual grading report.

Good luck