Aspect Ratio Calculator
Calculate dimensions and ratios for images to prevent Layout Shift (CLS).
Common Presets:
:
OR
:
aspect-ratio: 16 / 9;
16:9
About Aspect Ratio Calculator Tool
Calculate the aspect ratio of dimensions (e.g., 1920x1080 = 16:9) or find missing dimensions. Helps prevent Cumulative Layout Shift (CLS) by reserving the correct space for images.
How to Use Aspect Ratio Calculator
- Enter the Width and Height to find the Ratio.
- Or, select a Preset (like 16:9) and enter one dimension to find the other.
- Copy the generated CSS
aspect-ratiocode.
Frequently Asked Questions
Why is aspect ratio important for SEO?
Defining aspect ratios in CSS prevents content from jumping around as images load, improving Core Web Vitals (CLS).
What is standard video ratio?
Most online video (YouTube) uses 16:9. Vertical video (TikTok/Shorts) uses 9:16.
What is 4:3 used for?
It is the standard ratio for traditional photography and older TV screens.