How I Built a Real-Time CGPA Calculator using JavaScript and Firebase

Source: Dev.to

Solving the Student Grading Headache 🎓

As a Software Engineering student, I realized that tracking specific grades and calculating CGPA across different semesters was a hassle. Spreadsheets are boring, and manual calculation is prone to errors.

So, I built AcademiaTrack—a web‑based solution to solve this problem.

🛠️ The Tech Stack

• Frontend: HTML5, CSS3, JavaScript
• Styling: Tailwind CSS (for a modern, clean UI)
• Backend/Database: Firebase (to store user scores securely)

🚀 Key Features

• Real‑time Calculation: The logic updates your CGPA instantly as you input grades.
• Data Persistence: Thanks to Firebase, students can log out and come back to their saved data.
• Responsive Design: Works perfectly on mobile phones, where most students check their results.

💻 The Code

One of the biggest challenges was handling the weighting system for different courses. I used JavaScript array methods to map through the input fields and calculate the weighted average dynamically.