Instagram Image Aspect Ratio Calculator
Calculate the exact width or height needed to hit a target Instagram aspect ratio like 1:1, 4:5 or 9:16.
Result looking good? Take it further with Grohubz — your Instagram growth toolkit.
How this tool works
Enter one known dimension and a target ratio, and this calculator works out the matching side — useful when you're setting up a canvas in your design tool before exporting.
- Enter your known width or height in pixels.
- Choose the target Instagram ratio (1:1, 4:5, 1.91:1 or 9:16).
- Read off the calculated matching dimension.
- Set your canvas to those exact pixel values.
Tips to get better results
- Always round to whole pixels — design tools can behave unpredictably with fractional canvas sizes.
- 1080px is the safe baseline width for square and portrait posts; use it as your known value if you're starting from scratch.
- Keep a saved canvas preset per ratio so you're not recalculating for every new post.
Grow the account you just optimised
Grohubz gives creators and brands the growth playbooks, content calendars and analytics dashboards that turn a well-sized post into consistent follower growth.
Visit GrohubzFrequently asked questions
What aspect ratios does Instagram support for feed posts?
1:1 (square), 4:5 (portrait) and 1.91:1 (landscape) are the three supported feed ratios.
What ratio should Stories and Reels use?
9:16, the full-screen vertical ratio, is required for both Stories and Reels.
Why does my exported image look stretched?
This usually happens when the canvas ratio and the export ratio don't match — recalculate both dimensions from the same target ratio to fix it.
FREE TOOL BY GROHUBZ
Want the strategy to match the specs? Grohubz helps you plan, schedule and grow on Instagram — not just measure it.
This checker is built and maintained by the team at grohubz.com.