Aspect Ratio Calculator
Pick your screen ratio and the content ratio you're watching to see exactly how much letterboxing or pillarboxing you'll get — plus a resolution ratio finder and monitor PPI calculator you can expand when you need them.
화면비 계산기, 해상도 계산기, 모니터 비율, aspect ratio calculator, resolution calculator, ppi calculator, screen ratio, 4k qhd fhd 비교, 모니터 크기 계산, 레터박스 계산, 필러박스, letterbox calculator, 영상 비율 확인- Created
- 2026.09.01
- Updated
- 2026.09.15
How will this content look on my screen?
Letterboxed (bars top/bottom) · Actual visible area 76%
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How to use
Click your monitor's name — FHD, QHD, UWQHD, 4K UHD, 8K UHD — and the ratio of the content you're watching (a 21:9 video, an old 4:3 game, etc.) to instantly see how much letterboxing or pillarboxing you'll get, and exactly what percentage of the screen is actually used.
Click "More: resolution & PPI calculator" to find a ratio from a resolution like FHD, QHD, or 4K UHD, or solve for a missing width/height from a ratio.
Enter a monitor's diagonal size (inches) and resolution to get its PPI (pixel density) and physical width/height in cm.