Instagram Aspect Ratio & Dimensions Guide
Instagram supports multiple aspect ratios across its features: 4:5 (1080×1350 px) for portrait feed posts, 1:1 (1080×1080 px) for classic square posts, 1.91:1 (1080×566 px) for landscape images, and 9:16 (1080×1920 px) for Stories and Reels.
Instagram Complete Format Studio & Scaling Calculator
Pre-loaded with 1080 × 1350 (4:5portrait). Adjust width or height to calculate proportional dimensions.
Developer Outputs (CSS • HTML)Show CodeHide Code
aspect-ratio: 16 / 9;aspect-videowidth="1920" height="1080"The preview rectangle automatically scales proportionally to simulate true physical and screen viewport orientations, preventing distortion before you export.
Common 4:5 Resolutions & Formats
Exact pixel dimensions matching the 4:5 ratio across varying quality tiers.
| Standard / Tier | Dimensions (W × H) | Quality | Primary Use Case |
|---|---|---|---|
| Portrait Feed Post (Optimal) | 1080 × 1350 px | 4:5 Ratio | Maximum screen space on mobile feeds |
| Classic Square Post | 1080 × 1080 px | 1:1 Ratio | Perfect alignment with profile grid |
| Stories & Reels | 1080 × 1920 px | 9:16 Ratio | Full-screen immersive vertical video |
| Landscape Post | 1080 × 566 px | 1.91:1 Ratio | Wide panoramic photos or horizontal clips |
Safe Zone & UI Margins
4:5 portrait posts offer the highest engagement because they occupy the maximum vertical height allowed in the user's feed.
Recommended Video & Audio Codecs
Export settings to minimize server-side recompression artifacts and preserve crisp details.
What Aspect Ratio is Best for Instagram Posts?
The 4:5 portrait ratio (1080 × 1350 pixels) is the best choice for regular Instagram feed posts. It claims approximately 25% more vertical screen real estate than a square 1:1 image and over 100% more than a landscape 16:9 photo, keeping your post in the user's viewport longer as they scroll.
Frequently Asked Questions about 4:5
What aspect ratio is an Instagram post?
Instagram feed posts support three aspect ratios: 4:5 portrait (1080×1350 px), 1:1 square (1080×1080 px), and 1.91:1 landscape (1080×566 px). The 4:5 ratio is recommended for maximum reach.
Why does Instagram crop my photo?
If you upload an image taller than 4:5 (such as a 9:16 photo into the feed), Instagram will automatically crop the top and bottom to fit 4:5. Use our calculator to crop accurately before posting.
Need to calculate or inspect other aspect ratios?
Visit our universal aspect ratio calculator hub for drag-and-drop media inspection, multi-line batch processing, reverse resolution matching, and instant CSS export.
Go to Main Aspect Ratio Calculator →