Instagram Post Size and Aspect Ratio
Start with 1080 × 1350 px (4:5) to prepare a feed image that uses vertical space without relying on an uncontrolled platform crop. This page distinguishes a working canvas from a hard upload limit and gives you a calculator for permitted size variations.
Instagram Post size calculator
Exact target ratio.
Instagram Post quick answer
A useful starting canvas is 1080 × 1350 pixels, which has a 4:5 aspect ratio. Instagram supports more than one photo shape. The first item and current publishing preview should guide a carousel; 1080 × 1350 is a useful portrait canvas, not a universal requirement.
“Working size” means a practical file to design and export. It is not automatically the minimum, maximum or only size accepted by Instagram. The platform can resize, recompress or crop the uploaded asset for different screens.
Alternative sizes and orientations
Choose a row only when it matches the actual placement. The button loads that size into the calculator so you can inspect or scale it proportionally.
| Use | Dimensions | Decimal ratio | |
|---|---|---|---|
| Primary working canvas | 1080 × 1350 | 0.8000:1 | |
| Square post | 1080 × 1080 | 1.0000:1 | |
| 3:4 photo | 1080 × 1440 | 0.7500:1 | |
| Landscape post | 1080 × 566 | 1.9081:1 |
How to handle the crop
A 3:2 camera photo must lose width to fill 4:5. A square source must lose its top and bottom or gain side canvas.
Start with the highest-quality master, select the destination ratio before placing text, and inspect what filling the frame removes. If every source pixel matters, fit the source and design the remaining canvas rather than stretching it.
Measure the crop percentage or use the fit and crop calculator for exact output dimensions.
Safe-area and legibility check
Keep text and logos away from every edge because the feed, profile grid and share previews may frame the same post differently.
A safe area is not a permanent platform promise. Interface controls, captions, translations, device cutouts and responsive previews can all move. Test the actual upload preview, and keep an editable master so the composition can be revised without another lossy export.
For vertical placements, open the social safe-zone checker.
Export workflow that avoids common mistakes
- Confirm the exact placement—not merely the platform name—and choose its canvas.
- Place the subject first, then add text and logos inside a generous central margin.
- Resize proportionally. Never force the source to match by changing only width or height.
- Export once from a high-quality master using an appropriate image or video format.
- Open the final file, check sharpness and dimensions, then inspect the current Instagram publishing preview.
Dimensions do not determine file quality by themselves. Compression, color, codec, frame rate and the quality of the original still matter. Keep the editable source after publishing so future platform changes do not require enlarging a compressed download.
Official reference and scope
Instagram Help — image resolution for shared photos is the first-party reference used when reviewing this page. Where the platform does not publish one stable organic-placement raster, AspectRatioZ labels the dimensions as a practical working size instead of presenting them as a mandatory specification.
Advertising placements may use separate rules, file limits and safe zones. Confirm a paid campaign in its current ad manager before delivery.
Related Instagram and sizing tools
Instagram Post frequently asked questions
What size should I start with?
Start with 1080 × 1350 pixels for the 4:5 working canvas described here. Check the current uploader when your workflow has a strict minimum, maximum or file-size limit.
Can I use a larger file?
Usually a larger file at the same ratio can preserve detail, but acceptance and processing depend on the placement. Use the calculator above and confirm the current platform limit before export.
Will the correct dimensions prevent cropping?
They prevent a ratio mismatch for the intended canvas, but they cannot control every responsive preview or interface overlay. Keep important content inside a safe central area and review the live preview.
Does this tool upload my image?
No. The calculator only works with numbers in your browser. It does not request, upload or store your media.