Aspect Ratio Calculator
What Is an Aspect Ratio Calculator?
An aspect ratio calculator is a simple tool that helps you resize images or videos without distortion. Whether you’re a web designer, photographer, or content creator, maintaining the correct proportions ensures your visuals look sharp and professional across different devices.
This tool works by calculating the missing width or height based on the original dimensions and the aspect ratio you need. It’s ideal for tasks like:
- Scaling images for websites or social media
- Maintaining video dimensions during editing
- Converting 4:3, 16:9, 1:1, or custom aspect ratios
How to Use the Aspect Ratio Tool
- Enter the original width and height of your image or video.
- Change either the new width or height — the tool calculates the other instantly.
- Copy your new dimensions and apply them to your design or export settings.
This tool is free, fast, and works right in your browser, no logins, no ads, no clutter.
Why Aspect Ratio Matters
Using the correct aspect ratio ensures your visuals don’t appear stretched or cropped. Whether you’re working on a YouTube thumbnail, Instagram reel, or a responsive website image, consistent ratios keep your design looking clean and intentional.
Need common ratios? This tool supports:
- 1:1 (Square)
- 4:3 (Standard)
- 16:9 (Widescreen)
- 3:2, 2:1, and more
About This Aspect Ratio Calculator
This free aspect ratio calculator helps you resize images or videos quickly and accurately without losing quality. Whether you’re a designer adjusting website images, a video editor preparing content for social media, or just someone trying to keep visuals consistent, this tool makes it easy to calculate new dimensions while maintaining the correct proportions.
Simply input your original width and height, then enter either the new width or height, the calculator will do the rest automatically. It supports all standard aspect ratios like 16:9, 4:3, 1:1, and custom sizes too. You can even click on preset dimensions for platforms like Instagram, YouTube, Facebook, and more.
There’s no login required, no ads, and nothing to install. Just a clean, fast tool designed to save you time. If this aspect ratio calculator helps, feel free to share it or buy me a coffee to support continued development.
FAQ
What is an aspect ratio calculator?
How do I calculate aspect ratio from width and height?
To calculate aspect ratio, divide the width by the height. For example, 1920 ÷ 1080 = 1.78, which is commonly rounded to a 16:9 ratio. Our free aspect ratio calculator does this for you instantly. Just enter one dimension, and the aspect ratio tool fills in the rest.
Can I use this aspect ratio tool for videos?
What are the most common aspect ratios?
Some of the most common aspect ratios include:
- 1:1 for Instagram posts
- 16:9 for widescreen video (YouTube, HD)
- 4:3 for older TVs and some presentations
- 9:16 for TikTok and Reels
- 3:2 for photos from DSLRs
Our tool includes one-click buttons for each.
What happens if I resize without keeping the aspect ratio?
Resizing without maintaining aspect ratio can stretch or squash your image or video, making it look unprofessional. This tool ensures your content scales proportionally, preserving the original look and feel.
Is this aspect ratio calculator free to use?
Yes, it’s completely free. There are no logins, no ads, and no hidden costs. It’s designed for web designers, developers, photographers, and creators who need accurate aspect ratios on the fly.