Java Program To Calculate CGPA Percentage | 3 Simple Ways

in Java Programs October 13, 2025 Comments Off on Java Program To Calculate CGPA Percentage | 3 Simple Ways

How to write a java program to calculate CGPA percentage. Java code to calculate the CGPA ( Cumulative Grade Point Average ), in 5 different ways. Using standard values, using command line arguments, inputs through scanner class and user-defined method. Cumulative Grade Point Average ( CGPA ) is the overall grade point average. Definition and sample programs are described below about GPA. Check more programs for beginners and interview question and answers here.

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What is CGPA?

A: CGPA is overall grade point average. For each course, there are certain credits which are usually based on how many hours the class is held in each week.

How to calculate the CGPA and formula?

A: Your grade point average (GPA) is calculated by dividing the total amount of grade points earned by the total amount of credit hours attempted. Your grade point average may range from 0.0 to a 4.0. To get the example student’s GPA, the total grade points are divided by the total credit hours attempted. Here is the simple formula to calculate the GPA ( Grade point average formula )

Calculate GPA – Java Program In Five Ways

Program To Find CGPA – 1 ( Using standard values with outputs )

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Here we wrote the code with standard values. We also embedded an online execution tool below, do check it out. Standard values are nothing but using the above formula to find the GPA in the below program. For, every code we added three to four different types of outputs so that you will get an idea.

Java Code using standard values here.

class CGPA
{
  public static void main(String arg[])
  {
     int n=5;

     double m[]=new double[n];

     double g[]=new double[n];

     double cgpa,sum=0;

     m[0]=95;

     m[1]=85;

     m[2]=75;

     m[3]=80;

     m[4]=95;

     for(int i=0;i<n;i++)
     {
       g[i]=(m[i]/10);
     }

     for(int i=0;i<n;i++)
     {
        sum+=g[i];
     }

     cgpa=sum/n;

     System.out.println("cgpa="+cgpa);

     System.out.println("percantage from cgpa="+cgpa*9.5);

   }
}

class CGPA

{

public static void main(String arg[])

{

int n=5;

double m[]=new double[n];

double g[]=new double[n];

double cgpa,sum=0;

m[0]=95;

m[1]=85;

m[2]=75;

m[3]=80;

m[4]=95;

for(int i=0;i<n;i++)

{

g[i]=(m[i]/10);

}

for(int i=0;i<n;i++)

{

sum+=g[i];

}

cgpa=sum/n;

System.out.println("cgpa="+cgpa);

System.out.println("percantage from cgpa="+cgpa*9.5);

}

Output:

cgpa=8.6
percantage from cgpa=81.7

1 2	cgpa=8.6 percantage from cgpa=81.7

Sample Program GPA – 2 ( Using Command-Line Arguments )

Here we go another program using command line arguments. If you have no idea about command line arguments check out here: the Complete Guide. In simple command lines are nothing but giving inputs on the console it itself. Check out the code and output.

class CGPA
{
  public static void main(String args[])
  {
     int n;

     n=args.length;

     double marks[]=new double[n];

     double grade[]=new double[n];

     double cgpa,sum=0;

     for(int i=0;i<n;i++)
     {
       marks[i]=Long.parseLong(args[i]);
     }

     for(int i=0;i<n;i++)
     {
       grade[i]=(marks[i]/10) ;
     }

     for(int i=0;i<n;i++)
     {
       sum+=grade[i];
     }

      cgpa=sum/n;

      System.out.println("cgpa="+cgpa);

      System.out.println("percantage from cgpa="+cgpa*9.5);

   }
}

class CGPA

{

public static void main(String args[])

{

int n;

n=args.length;

double marks[]=new double[n];

double grade[]=new double[n];

double cgpa,sum=0;

for(int i=0;i<n;i++)

{

marks[i]=Long.parseLong(args[i]);

}

for(int i=0;i<n;i++)

{

grade[i]=(marks[i]/10) ;

}

for(int i=0;i<n;i++)

{

sum+=grade[i];

}

cgpa=sum/n;

System.out.println("cgpa="+cgpa);

System.out.println("percantage from cgpa="+cgpa*9.5);

}

Output ( Using command line arguments ) :

output:1
javac CGPA.java
java CGPA 85 95 66 77 25
cgpa=6.960000000000001
percantage from cgpa=66.12

output:2
javac CGPA.java
java CGPA 90 95 98 99 100
cgpa=9.64
percantage from cgpa=91.58000000000001

output:3
javac CGPA.java
java CGPA 85 95 66 77 55
cgpa=7.5600000000000005
percantage from cgpa=71.82000000000001

output:4
javac CGPA.java
java CGPA 70 70 70 70 70
cgpa=7.0
percantage from cgpa=66.5

output:1

javac CGPA.java

java CGPA 85 95 66 77 25

cgpa=6.960000000000001

percantage from cgpa=66.12

output:2

javac CGPA.java

java CGPA 90 95 98 99 100

cgpa=9.64

percantage from cgpa=91.58000000000001

output:3

javac CGPA.java

java CGPA 85 95 66 77 55

cgpa=7.5600000000000005

percantage from cgpa=71.82000000000001

output:4

javac CGPA.java

java CGPA 70 70 70 70 70

cgpa=7.0

percantage from cgpa=66.5

Calculate GPA Using Arrays

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Here we go another method to calculate a grade point average, taking inputs through scanner class method.

import java.util.Scanner;
class CGPA
{
  public static void main(String args[])
  {
     Scanner sc=new Scanner(System.in);

     System.out.println("Enter number of subjects");

     int n=sc.nextInt();

     double[] marks=new double[n];

     System.out.println("Enter marks");

     for(int i=0;i<n;i++)
     {
        marks[i]=sc.nextInt();
     }

     double grade[]=new double[n];

     double cgpa,sum=0;

     for(int i=0;i<n;i++)
     {
        grade[i]=(marks[i]/10) ;
     }

     for(int i=0;i<n;i++)
     {
       sum+=grade[i];
     }

     cgpa=sum/n;

     System.out.println("cgpa="+cgpa);

     System.out.println("percantage from cgpa="+cgpa*9.5);

   }
}

import java.util.Scanner;

class CGPA

{

public static void main(String args[])

{

Scanner sc=new Scanner(System.in);

System.out.println("Enter number of subjects");

int n=sc.nextInt();

double[] marks=new double[n];

System.out.println("Enter marks");

for(int i=0;i<n;i++)

{

marks[i]=sc.nextInt();

}

double grade[]=new double[n];

double cgpa,sum=0;

for(int i=0;i<n;i++)

{

grade[i]=(marks[i]/10) ;

}

for(int i=0;i<n;i++)

{

sum+=grade[i];

}

cgpa=sum/n;

System.out.println("cgpa="+cgpa);

System.out.println("percantage from cgpa="+cgpa*9.5);

}

Output ( Inputs Through Scanner Class ):

output:1
Enter number of subjects
5
Enter marks
90
80
70
80
90
cgpa=8.2
percantage from cgpa=77.89999999999999

output:2
Enter number of subjects
6
Enter marks
90
80
78
87
50
45
cgpa=7.166666666666667
percantage from cgpa=68.08333333333334

output:3
Enter number of subjects
5
Enter marks
75
85
88
98
65
cgpa=8.22
percantage from cgpa=78.09

output:1

Enter number of subjects

Enter marks

cgpa=8.2

percantage from cgpa=77.89999999999999

output:2

Enter number of subjects

Enter marks

cgpa=7.166666666666667

percantage from cgpa=68.08333333333334

output:3

Enter number of subjects

Enter marks

cgpa=8.22

percantage from cgpa=78.09

Java Program By Using Method

Java code for calculating CGPA using a user-defined method with sample outputs and execution tool. Check it out!

import java.util.Scanner;
class CGPA
{
  public static void main(String args[])
  {
     Scanner sc=new Scanner(System.in);

     System.out.println("Enter number of subjects");

     int n=sc.nextInt();

     double[] marks=new double[n];

     System.out.println("Enter marks");

     for(int i=0;i<n;i++)
     {
        marks[i]=sc.nextInt();
     }

     double cgpa,sum;

     sum= cgpaCalculation(marks);

     cgpa=sum/n;

     System.out.println("cgpa="+cgpa);

     System.out.println("percantage from cgpa="+cgpa*9.5);

  }

 static double  cgpaCalculation(double marks[])
 {
    double sum=0;

    double grade[]=new double[marks.length];

    for(int i=0;i<marks.length;i++)
    {
       grade[i]=(marks[i]/10) ;
    }

    for(int i=0;i<marks.length;i++)
    {
       sum+=grade[i];
    }

     return sum;
   }
}

import java.util.Scanner;

class CGPA

{

public static void main(String args[])

{

Scanner sc=new Scanner(System.in);

System.out.println("Enter number of subjects");

int n=sc.nextInt();

double[] marks=new double[n];

System.out.println("Enter marks");

for(int i=0;i<n;i++)

{

marks[i]=sc.nextInt();

}

double cgpa,sum;

sum= cgpaCalculation(marks);

cgpa=sum/n;

System.out.println("cgpa="+cgpa);

System.out.println("percantage from cgpa="+cgpa*9.5);

}

static double cgpaCalculation(double marks[])

{

double sum=0;

double grade[]=new double[marks.length];

for(int i=0;i<marks.length;i++)

{

grade[i]=(marks[i]/10) ;

}

for(int i=0;i<marks.length;i++)

{

sum+=grade[i];

}

return sum;

}

Output ( User define method ) :

output:1
Enter number of subjects
5
Enter marks
100
98
78
48
59
cgpa=7.659999999999999
percantage from cgpa=72.77

output:2
Enter number of subjects
6
Enter marks
90
90
90
90
90
90
cgpa=9.0
percantage from cgpa=85.5


output:3
Enter number of subjects
5
Enter marks
100
95
90
80
85
cgpa=9.0
percantage from cgpa=85.5

output:1

Enter number of subjects

Enter marks

100

cgpa=7.659999999999999

percantage from cgpa=72.77

output:2

Enter number of subjects

Enter marks

cgpa=9.0

percantage from cgpa=85.5

output:3

Enter number of subjects

Enter marks

100

cgpa=9.0

percantage from cgpa=85.5

Sample Program – 5 (using class)

Here we go another version of a program to calculate the GPA by creating a new separate class for ( CGPAcalculation) and taking inputs using scanner class method with sample outputs.

import java.util.Scanner;
 class  CGPACalculation
 {
    double sum=0;

    CGPACalculation(double marks[])
    {
      double grade[]=new double[marks.length];

      for(int i=0;i<marks.length;i++)
      {
        grade[i]=(marks[i]/10) ;
      }

      for(int i=0;i<marks.length;i++)
      {
       sum+=grade[i];
      }

    }

}

class CGPA
{
  public static void main(String args[])
  {
    Scanner sc=new Scanner(System.in);

    System.out.println("Enter number of subjects");

    int n=sc.nextInt();

    double[] marks=new double[n];

    System.out.println("Enter marks");

    for(int i=0;i<n;i++)
    {
       marks[i]=sc.nextInt();
    }

    double grade[]=new double[n];

    double cgpa,sum;

    CGPACalculation s= new CGPACalculation(marks);

    cgpa=s.sum/n;

    System.out.println("cgpa="+cgpa);

    System.out.println("percantage from cgpa="+cgpa*9.5);

   }
}

import java.util.Scanner;

class CGPACalculation

{

double sum=0;

CGPACalculation(double marks[])

{

double grade[]=new double[marks.length];

for(int i=0;i<marks.length;i++)

{

grade[i]=(marks[i]/10) ;

}

for(int i=0;i<marks.length;i++)

{

sum+=grade[i];

}

class CGPA

{

public static void main(String args[])

{

Scanner sc=new Scanner(System.in);

System.out.println("Enter number of subjects");

int n=sc.nextInt();

double[] marks=new double[n];

System.out.println("Enter marks");

for(int i=0;i<n;i++)

{

marks[i]=sc.nextInt();

}

double grade[]=new double[n];

double cgpa,sum;

CGPACalculation s= new CGPACalculation(marks);

cgpa=s.sum/n;

System.out.println("cgpa="+cgpa);

System.out.println("percantage from cgpa="+cgpa*9.5);

}

Output:

output:1
Enter number of subjects
1
Enter marks
100
cgpa=10.0
percantage from cgpa=95.0

output:2
Enter number of subjects
4
Enter marks
100
90
80
60
cgpa=8.25
percantage from cgpa=78.375

output:3
Enter number of subjects
5
Enter marks
50
60
70
80
90
cgpa=7.0
percantage from cgpa=66.5

output:1

Enter number of subjects

Enter marks

100

cgpa=10.0

percantage from cgpa=95.0

output:2

Enter number of subjects

Enter marks

100

cgpa=8.25

percantage from cgpa=78.375

output:3

Enter number of subjects

Enter marks

cgpa=7.0

percantage from cgpa=66.5

More Tutorials :

Learn Java Java Tutoring is a resource blog on java focused mostly on beginners to learn Java in the simplest way without much effort you can access unlimited programs, interview questions, examples

Java Program To Calculate CGPA Percentage | 3 Simple Ways

Calculate GPA – Java Program In Five Ways

Sample Program GPA – 2 ( Using Command-Line Arguments )

Calculate GPA Using Arrays

Java Program By Using Method

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