Aspect Ratio Calculator
Calculate pixel-perfect dimensions for any screen or social platform. Lock proportions to ensure your content never looks stretched.
Computed Output
?What is Aspect Ratio?
Aspect Ratio is the proportional relationship between an image’s width and its height. It is commonly expressed as two numbers separated by a colon, such as 16:9.
Regardless of the actual pixel size (be it 1920x1080 or 1280x720), if the simplified ratio is the same, the shape remains identical. Understanding this is vital for ensuring that video content or brand photography doesn’t look distorted when moved between different platforms.
Standard Platform Ratios
16:9 (Standard Video)
The universal standard for high-definition TV, YouTube, and widescreen monitors.
9:16 (Vertical Video)
Optimized for mobile viewing. Used for TikTok, Instagram Reels, and YouTube Shorts.
1:1 (Square)
The original Instagram format. Great for profile pictures and social feed ads.
4:5 (Social Portrait)
Common on Instagram feed posts to take up more vertical screen real estate.
How to use this tool
Start by entering your target ratio (e.g., 21:9 for UltraWide). Then, enter either the Width or Height you desire. Our calculator will instantly compute the matching dimension. Keep the "Linked" toggle active to maintain proportions automatically while you type.