CGPA to Percentage Converter Using Java (Basic But Accurate)

M Usama — Sat, 22 Mar 2025 17:06:55 +0000

import java.util.Scanner;

public class CgpaToPercentageConverter {

    // Conversion factor (commonly used formula: Percentage = CGPA * 9.5)
    private static final double CONVERSION_FACTOR = 9.5;

    public static void main(String[] args) {
        // Create a Scanner object to read input from the user
        Scanner scanner = new Scanner(System.in);

        // Prompt the user to enter their CGPA
        System.out.print("Enter your CGPA: ");
        double cgpa = scanner.nextDouble();

        // Validate the input (CGPA should be between 0 and 10)
        if (cgpa < 0 || cgpa > 10) {
            System.out.println("Invalid CGPA! CGPA should be between 0 and 10.");
        } else {
            // Convert CGPA to percentage
            double percentage = cgpa * CONVERSION_FACTOR;

            // Display the result
            System.out.printf("Your percentage is: %.2f%%\n", percentage);
        }

        // Close the scanner to avoid resource leak
        scanner.close();
    }
}

Explanation of the Code:

Importing the Scanner Class:

We import the Scanner class from the java.util package to read input from the user.

Defining the Conversion Factor:

We define a constant CONVERSION_FACTOR with a value of 9.5. This is a commonly used factor to convert CGPA to percentage.

Main Method:

The main method is the entry point of the program.

Creating a Scanner Object:

We create a Scanner object named scanner to read input from the user.

Prompting the User for Input:

We prompt the user to enter their CGPA using System.out.print.

Reading the CGPA Input:

We use scanner.nextDouble() to read the CGPA value entered by the user.

Input Validation:

We check if the entered CGPA is within the valid range (0 to 10). If not, we display an error message.

*Calculating the Percentage:
*
If the CGPA is valid, we calculate the percentage by multiplying the CGPA by the conversion factor (9.5).

Displaying the Result:

We use System.out.printf to display the calculated percentage with two decimal places.

Closing the Scanner:

Finally, we close the Scanner object to free up resources.

How to Run the Program:
Copy the code into a file named CgpaToPercentageConverter.java.

Compile the program using the command:

javac CgpaToPercentageConverter.java

Run the program using the command:

java CgpaToPercentageConverter

Enter your CGPA when prompted, and the program will display the corresponding percentage.
Example Output:

Enter your CGPA: 8.5
Your percentage is: 80.75%

At the end, you will get the CGPA to Percentage converter like https://cgpaintopercentages.com/

DEV Community: M Usama

CGPA to Percentage Converter Using Java (Basic But Accurate)

Explanation of the Code: