Portrait feed calculator
4:5 Aspect Ratio Calculator
Use this 4:5 calculator to create portrait feed images with more vertical space than a square post.
Ratio preview
Instagram portrait posts, Facebook feed ads, product images, travel posts, and mobile-friendly feed creatives.
Calculate 4:5 dimensions
Enter width or height. The matching dimension updates automatically to keep the 4:5 shape.
4:5 result
1,080 × 1,350
4:5 ratio
- Decimal
- 0.800:1
- Orientation
- Portrait
- CSS
- aspect-ratio: 4 / 5;
Common 4:5 sizes
| Use | Size | Note |
|---|---|---|
| Social portrait | 1080 × 1350 | Common Instagram portrait feed size. |
| Compact portrait | 800 × 1000 | Useful for lightweight previews. |
| High-res portrait | 1600 × 2000 | Good for sharper design exports. |
| Ad creative | 1200 × 1500 | Useful portrait ad design baseline. |
Best uses
Direct answer
What is the 4:5 aspect ratio?
The 4:5 aspect ratio is a portrait frame measuring four units wide for every five units high. A common social-image size is 1080 × 1350 pixels. Compared with a square image, 4:5 provides more vertical space in a feed while remaining shorter than full-screen 9:16 stories, Reels, or Shorts.
Find height
height = width × 5 ÷ 4
Find width
width = height × 4 ÷ 5
| Concept | What it describes | Example |
|---|---|---|
| Aspect ratio | The proportional shape of a frame | 4:5 |
| Resolution | The number of pixels in that frame | 1080 × 1350 |
Crop and placement check
Preview a square or landscape source inside 4:5 before export. Keep faces, product labels, and text away from the crop boundary, and verify the destination placement because platform previews and profile grids may show a different crop.
How to use 4:5
Use 4:5 for portrait feed visibility
A 4:5 export gives more vertical space than a square while still fitting many feed placements. Use it for social portraits, product posts, and mobile-friendly ads that need attention without becoming a full-screen story.
Frequently asked questions
Is 1080 × 1350 a 4:5 ratio?
Yes. 1080 × 1350 simplifies to 4:5.
Is 4:5 better than square for Instagram?
Often yes for feed posts because it uses more vertical screen space while still fitting a standard feed placement.
Is 4:5 the same as 5:4?
No. 4:5 is portrait, while 5:4 is landscape.
Can I convert 9:16 to 4:5?
Yes, but you will usually crop top and bottom space. Keep key subjects near the center before converting from story format to portrait feed format.
Review record
Sources and review date
Last reviewed August 1, 2026. Calculations use the width-to-height relationship shown on this page.
More ratio calculators
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Calculate 9:16 →Guide collection
Related guides
Use these supporting guides to understand the tool result and next testing steps.
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