4:5 Aspect Ratio Calculator
Need the perfect portrait size for a social post? Enter the width or height in pixels below and this 4:5 aspect ratio calculator instantly finds the other dimension, including the standard 1080x1350 Instagram portrait size.
What is the 4:5 Aspect Ratio?
The 4:5 aspect ratio is a portrait rectangle: for every 4 units of width there are 5 units of height, which makes it taller than a square but shorter than a full-screen 9:16 video. In decimal form it is 0.8:1.
4:5 is the favorite shape of Instagram portrait posts because it fills more of the feed than a square without turning into a Story. The same shape shows up in photo prints like 8x10 inches.
Common 4:5 Resolutions
Here are the most common 4:5 sizes, from small to large:
- 480 x 600 (thumbnail portrait)
- 600 x 750 (small social post)
- 864 x 1080 (half-resolution post)
- 1080 x 1350 (Instagram and Facebook feed portrait)
- 1200 x 1500 (Facebook portrait ad size)
- 1440 x 1800 (Meta 4:5 ad creative size)
- 2400 x 3000 (print-quality 8 x 10 at 300 DPI)
For social media, the number to remember is 1080 x 1350. Everything scales from there: double it to 2160 x 2700 for extra sharpness, or halve it to 540 x 675 for lighter files.
Where You See 4:5
- Instagram portrait posts and carousels: 1080 x 1350 pixels. Vertical posts take up more feed space than square posts.
- Facebook feed photos: 1080 x 1350 pixels for the best portrait crop, the same size used for Instagram.
- Photo prints: 4 x 5, 8 x 10 and 16 x 20 inch prints are exact 4:5, which is why 8x10 frames match phone portrait photos so well.
- Story-style ads: Many ad platforms offer a 4:5 placement that sits between square and full-screen vertical.
Note that 8 x 10 prints are not the same shape as 8 x 12 prints (which are 2:3). If you print a 4:5 photo at 8 x 12, the top and bottom get cropped.
4:5 FAQ
What is 4:5 in pixels?
The standard size is 1080 x 1350 pixels for Instagram portrait posts. Any pair where the height is 1.25 times the width works, like 1200 x 1500 or 2400 x 3000.
What size is an Instagram 4:5 post?
Instagram's recommended 4:5 size is 1080 x 1350 pixels. Uploads as large as 1440 x 1800 are also accepted and scaled down automatically.
Is 8x10 a 4:5 ratio?
Yes. 8 x 10 inches simplifies to 4:5, which is why 8x10 prints match portrait photos from most phone cameras.
Should I use 4:5 or 1:1 for Instagram?
4:5 takes up more vertical space in the feed than a square, so it usually earns more attention. 1:1 is safer if you want a clean grid layout. See the 1:1 calculator.