An aspect ratio is the proportional relationship between width and height, expressed as two numbers (like 16:9). It is crucial for maintaining image quality, ensuring content displays correctly across devices, and preventing distortion when resizing images or videos.

What is the difference between 16:9 and 4:3 aspect ratios?

16:9 is the modern widescreen format used by most TVs, monitors, and videos. 4:3 is the traditional format used by older TVs and monitors. 16:9 is ideal for modern content, while 4:3 works well for presentations and older media.

How do I calculate dimensions for a specific aspect ratio?

Use the Calculate Dimension mode: choose a ratio, then enter either width or height. The calculator determines the other dimension to maintain exact proportions.

What aspect ratio should I use for social media?

It depends on the platform. Instagram posts are 1:1, Stories and TikTok are 9:16, and YouTube videos are 16:9. The calculator includes presets for common formats.

Can I use this calculator for print design and photography?

Yes. Common photography ratios include 3:2 and 4:3, while print sizes can be 4:6 or 8.5:11. Enter any custom dimensions to find their ratio.

What happens if I do not maintain aspect ratio when resizing?

Without the correct ratio, images and videos look stretched or squashed. This tool ensures your content keeps its original proportions at any size.

Professional aspect ratio calculator for all media

Use this calculator to maintain perfect proportions across web, print, video, and social media. Enter dimensions to find ratios or lock a ratio and calculate the matching width or height.

Why aspect ratios matter

Professional quality

Maintain consistent proportions for clean, professional visuals.

Platform optimization

Create content sized for each device and platform without distortion.

Time efficiency

Calculate exact dimensions instantly instead of trial and error.

Creative consistency

Keep a consistent look across your entire content ecosystem.

Popular aspect ratios

Digital and web

16:9 - YouTube, modern monitors, HDTV
21:9 - Ultrawide monitors, cinematic content
4:3 - Traditional web content, presentations
1:1 - Instagram posts, profile images

Photography and print

3:2 - DSLR cameras, standard prints
4:5 - Portrait formats and social posts
8.5:11 - US letter documents
9:16 - Mobile vertical, Stories, TikTok

Two calculation modes

Calculate ratio

Enter width and height to discover the aspect ratio.

Calculate dimension

Pick a ratio and enter one dimension to get the other.

Professional use cases

Video production: match broadcast and social standards.
Photography: crop accurately without distortion.
Web design: build responsive layouts for every screen.
App development: design for multiple device ratios.
Print design: scale artwork for paper formats.