Design Utility

Aspect Ratio Calculator

Use this image ratio calculator to simplify dimensions, resize without distortion, and compare common ratios for design, print, and social media.

Aspect Ratio Calculator

Enter image width and height to get a simplified ratio, then resize while preserving proportions.

Simplified Ratio

16:9

Resize From Width

1200 x 675

Resize From Height

-

Common Ratios Cheat Sheet

1:1

Square social posts, avatars

4:5

Portrait posts and print layouts

3:2

Photography and posters

16:9

Video, presentations, widescreen

21:9

Ultra-wide media and banners

Common Image Ratios

RatioTypical Use
1:1Square social posts, avatars
4:5Portrait posts and print layouts
3:2Photography and posters
16:9Video, presentations, widescreen
21:9Ultra-wide media and banners

FAQ: Aspect Ratio Questions

What is the most common aspect ratio for websites?

16:9 is the standard for video and widescreen displays. For web content, 16:9 or 4:3 are common. For social media, aspect ratios vary by platform—1:1 for Instagram posts, 9:16 for stories.

How do I keep aspect ratio when resizing?

Use the formula: (New Width ÷ Original Width) × Original Height = New Height. Or better yet, use this calculator to do it instantly.

What ratio should I use for Instagram?

For square feed posts: 1:1. For portrait feed posts: 4:5. For Stories and Reels: 9:16. Always check the platform's current specs, as they occasionally update.

What happens if I don't maintain aspect ratio?

Your image stretches or squishes. A portrait photo stretched to wide ends up looking distorted and unprofessional. Always maintain the original ratio unless intentionally cropping.

Should I match print paper size to aspect ratio?

Yes. A4 paper is roughly 4:5 aspect ratio, while 8x10 prints are 4:5. Matching aspect ratio prevents unwanted cropping. Use our paper size chart to find the right dimensions.

Learn More & Related Tools

Read our comprehensive aspect ratio guide to master ratios for any screen and design.

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