Aspect Ratio Calculator
A tool for calculating image and video aspect ratios from width and height values, with reverse-calculation to find new dimensions that maintain the original ratio. It includes common aspect ratio presets such as 16:9 (YouTube), 4:3 (traditional), and 1:1 (Instagram) for quick reference. Convenient for web designers planning responsive layouts, video editors preparing content for different platforms, and graphic artists resizing artwork proportionally.
Enter a number
Enter a number in any base to automatically convert it to other bases
Practical Guide
Converters and validators for Base64, JWT, hashes, QR codes, URL encoding, and related formats. Helpful for API work, shareable data, and specification checks.
When this tool is useful
Aspect Ratio Calculator helps with common Encode & Convert tasks that require quick checking, conversion, or creation. It supports workflows such as Auto-calculate aspect ratio from width and height, Reverse-calculate resize dimensions maintaining ratio without forcing users to switch pages or apps.
Processing and privacy
Your input is processed in the browser and is not designed to be sent to a server just to use the tool. This makes it suitable for temporary checks, draft work, and pre-publication cleanup.
Workflow tip
After checking the result, use the related tools and same-category links near the bottom of the page to continue the surrounding task. Frequently used tools also appear in the Recently Used section.
Aspect Ratio Calculator Features
- Auto-calculate aspect ratio from width and height
- Reverse-calculate resize dimensions maintaining ratio
- Common aspect ratio presets (16:9, 4:3, etc.)
- Handy for image and video size calculations
How to Use
- 1Enter width and height to calculate aspect ratio
- 2Select a preset ratio to calculate resize values
- 3Apply calculated results for resizing