Aspect Ratio Explained for Images, Video, and Web Layouts
Understand aspect ratio, calculate matching dimensions, and prevent stretching when resizing media.
Aspect ratio describes the proportional relationship between width and height. Preserving it prevents stretching when media is resized.
Common ratios
- 1:1 for squares.
- 4:3 for traditional displays.
- 16:9 for widescreen video.
- 9:16 for vertical video.
Resizing versus cropping
Resizing preserves the full image. Cropping removes part of it to fit a different ratio.
Use the calculator
The Aspect Ratio Calculator computes a matching height from a new width.
Frequently asked questions
Why does an image look stretched?
Width and height were changed independently without preserving the ratio.
Written and reviewed by:ATOMOS Tools Editorial Team
Last reviewed: August 1, 2026
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