Device Screen Aspect Ratio & Resolution Calculator
Enter pixel width/height (e.g. 1920x1080) to get the simplified ratio (16:9, 4:3, 21:9…)
Takes any width and height in pixels and reduces it to a simple aspect ratio like 16:9, so you know exactly what frame shape you're working with.
도구를 불러오는 중…
🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Enter the width (px) and height (px).
- Read off the calculated aspect ratio.
FAQ
- Does this work for monitor resolutions too?
- Yes — it handles 4K, QHD, FHD, and any other device resolution correctly, since the ratio calculation is purely proportional.
- Is this useful for video editing or thumbnail sizing?
- Yes. It's handy for checking standard frame ratios ahead of time — like YouTube's 16:9 or the 9:16 used for Shorts and Reels — before you lock in your project's working resolution.
- Can two resolutions share the same ratio but still be different sizes?
- Yes. 1920x1080 and 3840x2160 are both 16:9, but they have very different pixel density — ratio and resolution are two separate things.