Aspect ratio calculator
Enter any two of ratio, width and height, and get the third. Presets cover the shapes you actually need.
Ratio
Slides, YouTube, screen recordings
Dimensions
1920 × 1080
Simplified
16:9
Decimal ratio
1.7778
Megapixels
2.07 MP
Shape preview
How to use it
- Pick a ratio preset or enter your own.
- Type a width or a height.
- Read off the other.
Questions
Which ratio should I use where?
16:9 for slides, YouTube and most screen recordings. 9:16 for phone-first video. 1:1 for avatars and grid posts. 1.91:1 for link previews on most social platforms. 4:3 for older projectors and some documentation themes.
Related tools
- Image resizerResize images to exact pixel dimensions or by percentage, with the aspect ratio locked. Free, private, in your browser.
- Image cropperCrop an image by dragging, with optional aspect-ratio locking for 1:1, 4:3, 16:9 and 9:16. Free and private.
- Screen resolution calculatorCalculate PPI, aspect ratio and total pixel count from a screen's resolution and diagonal size.
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The desktop app captures the screen, applies your styling and puts the result on your clipboard without a browser tab, an upload, or a download folder full of files called Screenshot (3).png. One payment, one Mac and one Windows PC, lifetime updates.