Instagram Post Aspect Ratio Calculator
Instagram feed posts support three aspect ratios: square 1:1 (1080×1080), portrait 4:5 (1080×1350) and landscape 1.91:1 (1080×566). Portrait 4:5 takes up the most feed space and is the default choice for creators.
Ratio locked to Instagram Post. Enter either side, get the other.
Enter a width or height above.
Common Instagram Post sizes
| Pixels | Usage |
|---|---|
| 1080×1080 | Square post (1:1) |
| 1080×1350 | Portrait post (4:5) |
| 1080×566 | Landscape post (1.91:1) |
| 1080×1920 | Reels & Stories (9:16) |
| 320×320 | Profile picture |
Frequently asked questions
What is the best Instagram post size in 2026?
1080×1350 pixels (4:5 portrait) is the recommended feed size — it is the tallest allowed ratio and occupies the most screen space. Export at 1080px width for all Instagram formats.
What happens if my photo is a different ratio?
Instagram crops it. Widths below 320px get upscaled and look soft; ratios outside 1.91:1–4:5 get center-cropped, potentially cutting off subjects.
Are Stories and Reels the same size?
Yes — both use 9:16 at 1080×1920. Design once and reuse for Stories, Reels, TikTok and YouTube Shorts.