1:1 Aspect Ratio - Width, Height & CSS Dimensions
A 1:1 aspect ratio means width is 1 units for every 1 units of height. Square Instagram feed posts and profile avatars. At 1080px wide, the matching height is 1080px. Use the calculator below for any width or height.
Dimensions
Simplified ratio
1:1
Common ratios
Social media
Photography
Common ratios
Social media
Photography
1:1 dimensions reference
Square Instagram feed posts and profile avatars. Sample calculation: 1080px × 1080px preserves 1:1. Adjust width in the tool above to regenerate height instantly.
1:1 Aspect Ratio FAQ
What is the 1:1 aspect ratio?
1:1 expresses width-to-height as 1:1. Square Instagram feed posts and profile avatars. In CSS, write aspect-ratio: 1 / 1. The decimal width÷height value is approximately 1.0000.
If width is 1080px at 1:1, what is the height?
Multiply width by 1/1: 1080 × (1 ÷ 1) = 1080px. Enter 1080 in the width field with ratio locked to 1:1 and the tool returns 1080px automatically.
What pixel dimensions are common for 1:1?
Square 1:1 exports commonly use 1080×1080 or 1200×1200 px for social feed posts.
How do I set 1:1 in CSS?
Use aspect-ratio: 1 / 1 on a block container. Pair it with width: 100% or a fixed max-width; the browser computes height. For embedded video, wrap the iframe in a 1:1 box to prevent cumulative layout shift.
1:1 calculator vs generic resize tool: why use a ratio-specific page?
Ratio-specific pages document common resolutions and use cases for 1:1 without hunting presets. The embedded calculator is pre-loaded with 1:1 so you skip manual ratio entry - helpful when sharing links with teammates or clients.
Where is the full aspect ratio calculator?
The main Aspect Ratio Calculator supports any custom ratio, simplified GCD output, and all presets. Visit /dev-tools/aspect-ratio-calculator/ for the complete tool with methodology and cross-links to other Dev Tools.
Sources & review
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