Aspect Ratio Calculator: A Clean & Fast Tool for Designers, Developers & Creators

🎯 Resize smarter, not harder.
Whether you’re designing a YouTube thumbnail, coding a responsive image block, or exporting video clips — getting the aspect ratio right is critical. But doing the math every time? Annoying.

That’s why this Aspect Ratio Calculator is built:
A lightweight, browser-based tool made with pure HTML, CSS, and JavaScript that lets you calculate width or height based on your chosen aspect ratio — fast, easy, and accurate.

No ads. No sign-ups. No distractions. Just a clean interface that does one job perfectly.

⚙️ Core Features

• ✅ Supports any custom aspect ratio (like 16:9, 4:3, 21:9, etc.)

• ✅ Enter width or height — instantly get the matching value

• ✅ Works offline — no internet required

• ✅ Fully responsive & mobile-friendly layout

• ✅ Editable source code — easy to customize or embed in your own projects

• ✅ Great as a utility tool in design systems or dev toolkits

👨‍💻 Ideal For

• Graphic designers & content creators

• Frontend developers

• YouTubers, editors & filmmakers

• UI/UX designers

• Digital product creators building calculators/tools

📦 You’ll Receive

• index.html – Main interface

• style.css – Clean, minimal styling

• script.js – All logic handled with vanilla JavaScript

• Commented & beginner-friendly codebase

• Ready-to-use: open in browser and go!