Calculate aspect ratios and find proportional dimensions for any use case. Enter a width or height and get the corresponding value for your target ratio.
Common Social Media Aspect Ratios
- **16:9** — YouTube thumbnails, landscape videos, Twitter cards
- **9:16** — Stories, Reels, TikTok, YouTube Shorts
- **1:1** — Instagram square posts, profile pictures
- **4:5** — Instagram portrait posts (most feed space)
- **4:3** — Traditional photo format
- **1.91:1** — Instagram landscape, Open Graph images
How to Use
Enter a known dimension (width or height) and the target ratio, and the calculator instantly shows the corresponding dimension. Or enter both width and height to find what ratio they represent.
Why Aspect Ratios Matter
Maintaining the correct aspect ratio prevents distortion. When you upload an image to social platforms, they may auto-crop if the ratio does not match their requirements. Knowing the ratio in advance lets you prepare the perfect crop.
Calculating Custom Ratios
For custom dimensions, enter both your width and height. We will simplify the ratio to its lowest form (e.g., 1920:1080 becomes 16:9).