A lightweight web app that helps you convert academic marks from one scale to another — and even reverse-calculate how much you need to score. Includes theme toggling, real-time validation, and a sleek history system that remembers your last 5 conversions.
- 🔢 Standard Calculator – Convert your obtained marks to a target scale and get the percentage instantly.
- 🔁 Reverse Calculator – Figure out how many marks you need to achieve a target on a different scale.
- 🌙 Dark Mode – Toggle between light and dark themes with a smooth animation.
- 📜 Conversion History – Keeps track of your 5 most recent conversions using
localStorage. - ❗ Input Validation – Real-time feedback for invalid or missing inputs.
- 💡 Intuitive UI – Tab-based interface with clearly labeled inputs.
- HTML / CSS
- JavaScript (Vanilla) – No frameworks, no dependencies
- Use the tabs to switch between Standard and Reverse calculators.
- Enter the relevant values – results update in real time.
- Use the ✕ buttons to remove specific history entries.
- Toggle the theme using the button in the corner (your preference is saved).
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Got 78 out of 100 and want to convert it to a 10-point scale?
➡️ It shows 7.8 and 78%. -
Want to score 32 out of 40 but on a different 50-point scale?
➡️ It tells you how much you need to aim for.
- Add GPA conversion
- Add mobile-friendly UI tweaks
Built to solve a problem we all face during grade conversion season.
If it helps you breathe a little easier before results, it’s doing its job.