Instagram Mixed Aspect Ratio Calculator
Calculate the exact dimensions for Instagram feed posts, stories, and reels. Mixed aspect ratio calculator for 1:1, 4:5, 1.91:1, and 9:16 formats.
Image & Format Details
Enter your base dimension and calculate the perfect size for every Instagram format.
Choose whether your starting dimension is the width or the height.
Enter the pixel value for your chosen base dimension (1080px is recommended).
Enter the width part of your custom aspect ratio.
Enter the height part of your custom aspect ratio.
Aspect Ratio Results
Perfect dimensions for your Instagram content
Enter your base dimension above, then click Calculate Dimensions to see the exact sizes for all Instagram formats.
Instagram Image Size Guidelines
Use this chart to quickly reference the recommended dimensions and aspect ratios for all Instagram content formats.
| Format | Aspect Ratio | Recommended Size | Notes |
|---|---|---|---|
| Profile Picture | 1:1 | 320 x 320 px | Displays as a circle |
| Feed Post (Square) | 1:1 | 1080 x 1080 px | Standard feed post |
| Feed Post (Portrait) | 4:5 | 1080 x 1350 px | Maximizes screen space |
| Feed Post (Landscape) | 1.91:1 | 1080 x 566 px | Wide format |
| Story / Reel | 9:16 | 1080 x 1920 px | Full-screen vertical |
Instagram Sizing FAQ
Everything you need to know about Instagram image sizes, aspect ratios, and avoiding unwanted cropping.
For feed posts, the best aspect ratios are 1:1 (Square), 4:5 (Portrait), and 1.91:1 (Landscape). For Stories and Reels, the required aspect ratio is 9:16. Portrait (4:5) is highly recommended for feed posts as it takes up the most screen space.
The best size for an Instagram portrait post is 1080 x 1350 pixels, which corresponds to a 4:5 aspect ratio. This format maximizes the vertical screen space on mobile devices, making your content more engaging and visible.
Instagram Reels and Stories require a 9:16 aspect ratio. The recommended resolution for these formats is 1080 x 1920 pixels to ensure they display perfectly in full-screen without being cropped.
Yes, Instagram supports landscape images at a 1.91:1 aspect ratio (minimum 1080 x 566 pixels). However, landscape posts take up less screen space in the feed compared to square or portrait posts, which may result in lower engagement.
Yes, if you upload an image with an aspect ratio outside of Instagram’s supported limits (e.g., taller than 4:5 or wider than 1.91:1 for feed posts), the app will automatically crop it to fit. Using this calculator ensures your images are perfectly sized to avoid unwanted cropping.