About Aspect Ratio Calculator
Calculate proportional width and height when resizing video and image frames. Simplifies pixel dimensions into standard aspect ratios and calculates target resolutions.
Key Capabilities & Features
- Calculate simplified ratio (e.g. 1920x1080 -> 16:9)
- Calculate new height from new width or vice versa
- Common ratio presets (16:9, 9:16, 4:3, 1:1, 21:9)
- Visual aspect frame preview
How to Use Aspect Ratio Calculator
Enter Original Dimensions
Type original width and height in pixels.
Set Target Width or Height
Enter your desired new dimension to calculate the corresponding proportional dimension.
Copy or Apply Ratio
Copy the simplified aspect ratio or apply it directly to your video editor or image canvas.
Privacy & In-Browser Execution Guarantee
Pure mathematical calculation in your browser.
Frequently Asked Questions
What is the standard vertical video aspect ratio for Shorts and TikTok?
Standard vertical video uses 9:16 aspect ratio (commonly 1080x1920 pixels).
How is the simplified aspect ratio calculated from custom pixel resolutions?
The engine uses the Euclidean greatest common divisor (GCD) algorithm to divide both width and height by their common denominator, followed by approximation matching against industry-standard video standards (such as 16:9, 9:16, 4:3, 1:1, and 21:9).
What is the difference between 16:9 and 21:9 ultrawide aspect ratios?
16:9 (1.77:1) is the universal standard for YouTube, HDTV, and standard computer displays. 21:9 (2.33:1 or 2.39:1) is the anamorphic ultrawide standard used in cinematic feature films and curved gaming monitors.