Aspect ratio calculator › 4:5

4:5 Aspect Ratio Calculator

Use this 4:5 aspect ratio calculator for portrait images that need more height than a square but should not become a full vertical Story. The 4:5 ratio is especially useful for Instagram feed posts because 1080×1350 uses more screen space than a 1:1 square while still fitting the feed.

4:5 calculator

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Ratio
1080 1350 4:5
Drop an image to read its ratio

Common 4:5 sizes

Size / ratioLabelUse-case
1080×1350Instagram portrait postMost common 4:5 social size
800×1000Web/social graphicSmaller portrait export
1200×1500High-resolution social imageReusable design source
1600×2000Photography cropLarge portrait crop
2400×3000Print/design sourceHigh-resolution 4:5 master

4:5 formula

Best uses for 4:5

The 4:5 ratio is a practical portrait shape. It is taller than a square but not as tall as 9:16, which makes it ideal for feeds where a full-screen Story shape would be too vertical.

For Instagram, 1080×1350 is the key 4:5 size. It gives more visual space than a square post and often makes the image feel larger in the feed. It is also useful for product shots, quote graphics, portrait photography and vertical ads that should remain feed-friendly.

This ratio owns the “portrait but not full-screen” use case. A 4:5 image is ideal when the asset should feel taller than a square without becoming a Story or Reel — Instagram feed posts, product graphics, quote cards, vertical ad creatives and portrait photography crops that still need to sit comfortably inside a feed.

Useful examples include 800×1000 for lightweight graphics, 1080×1350 for Instagram, 1200×1500 for a reusable design export and 2400×3000 for a high-resolution master. These differ from 9:16 because the goal is feed presence rather than full-screen mobile video. Compare the trade-off with the Instagram, 1:1 and 9:16 calculators.

Frequently asked questions

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