Aspect Ratio Calculator
Calculate image/video dimensions
How to Use
1
Enter dimensions
Type width and height to find the ratio.
2
Or enter ratio
Enter a ratio (16:9) and one dimension.
3
View calculations
See the simplified ratio and calculated dimensions.
4
Copy values
Copy the dimensions for your project.
Frequently Asked Questions
What are common aspect ratios?
16:9 (HD video), 4:3 (old TV), 1:1 (square), 21:9 (ultrawide), 9:16 (mobile vertical).
How do I maintain aspect ratio when resizing?
Enter one dimension (width or height) and the other is calculated automatically based on the ratio.
What is the best ratio for social media?
Instagram: 1:1 or 4:5. YouTube: 16:9. TikTok/Stories: 9:16. Twitter: 16:9 or 1:1.
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