Aspect Ratio Calculator
Enter a width and height to see the simplified ratio. Or enter a ratio and one dimension to get the other, which is handy for matching an AI model’s output to a platform.
How to use it
- Enter a width and height to read the ratio.
- To resize, enter the target ratio and either a new width or a new height.
- Use the result when you set the aspect ratio in your AI model or editor.
Frequently asked questions
What aspect ratio is 1920 by 1080?
16:9, the standard widescreen video ratio.
What ratio should I use for vertical video?
9:16 is the common choice for TikTok, Reels and Shorts.
See it in practice
Browse prompts with the exact settings and method to recreate them.