A tool to calculate and manage course grades with theme toggling and visual feedback.
Users
11
−1 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
1
0 in 30 days
Store rank
#187K
#156K among extensions
Version
1.0
updated 10 May 2025
Users
monthly, 17 months
Latest, 16 Oct 2026:11 usersMove the mouse over the chart for any month
Ratings count
monthly, 17 months
Latest, 16 Oct 2026:1 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About Grade Calculator
I got tired of constantly switching tabs to calculate my grades, so I decided to make a Chrome extension to simplify things. I built a Grade Calculator that lets me add courses, input weights and grades for assignments, and see my current mark, final exam worth, and what I need to score for target grades (like 90%). It even saves my data when I close the popup, which is a huge help. 🕟 🧑💻
What I Used:
HTML & CSS: For the popup’s structure and styling, including a light/dark mode toggle.
JavaScript: Handled the logic, DOM manipulation, and event handling to make it interactive. ⚡
Chrome Storage API: Used to save course data persistently.
Chart.js: Added a basic chart for course weights (still a work in progress).
LocalStorage: A fallback for testing outside the extension.
What I Learned:
I came from a C background, so JavaScript was new territory. I picked up DOM manipulation (creating and updating elements), event handling (like clicks and input changes), and working with asynchronous APIs (like Chrome Storage). I also learned about Chrome extension setup—manifest files, permissions, and debugging in the browser. It was a great way to organize my code and improve my skills. ⚡ 📱