What is the 4:5 aspect ratio?
4:5 is 4 units wide for every 5 units tall. As a decimal that is 0.8, so the height is 1.25 times the width. In a scrolling feed it takes up more screen space than a square, while still showing the whole image without the heavy crop of 9:16.
How to calculate 4:5 dimensions
height = width × 5 ÷ 4width = height × 4 ÷ 54 ÷ 5 = 0.8A 1080 px wide post needs 1080 × 5 ÷ 4 = 1350 px of height, so 1080 × 1350 is the usual export size.
Where 4:5 is used
- Portrait feed posts: 1080 × 1350 is a popular choice for maximum feed space.
- Print: 8 × 10 inch prints are 4:5, so the shape is familiar from photo frames.
- Portrait photography: a natural crop for head-and-shoulders portraits.
A landscape camera photo must be cropped heavily to become 4:5. A portrait-orientation 3:4 photo only loses about 6% of its height. Shoot vertically if you know the post will be 4:5.
Frequently asked questions
What size is a 4:5 image?
1080 × 1350 pixels is the most common size. Any size where width ÷ height = 0.8 is 4:5.
Is 4:5 the same as 8×10?
Yes. 8 ÷ 10 = 0.8 = 4 ÷ 5. An 8 × 10 inch print has a 4:5 aspect ratio.
4:5 or 9:16 for vertical content?
Use 4:5 for feed posts that sit among other posts. Use 9:16 for full-screen experiences like stories and short-form video.