Aspect Ratio Calculator
Solve width, height and aspect ratio.
:
Resolution
1920 × 1080
Simplified ratio
16 : 9
About the Aspect Ratio Calculator
Lock an aspect ratio and solve for the missing width or height — handy for video, images and responsive design. Keep 16:9, 4:3 or any custom ratio without the guesswork.
How to use it
- 1Enter your aspect ratio (e.g. 16:9) or a known dimension.
- 2Type the width or height you have.
- 3Read the matching dimension that preserves the ratio.
Frequently asked questions
- What aspect ratio should I use for video?
- 16:9 is standard for most screens and platforms; 9:16 is used for vertical/mobile video.
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