Aspect Ratio Calculator
Calculate simplified aspect ratio and scale dimensions.
About this tool
Find the simplified aspect ratio (like 16:9) of any image or video dimensions, and see what height a new width would need to keep that same ratio.
Key Features
- Simplified ratio (e.g. 1920\u00d71080 \u2192 16:9)
- Scale to a new width while preserving ratio
- Works for any image, video or screen dimensions
How to Use
- Enter the original width and height.
- Optionally enter a new width to scale to.
- Click Calculate.
Benefits
- Resize images or video without distorting them
- Identify standard ratios (16:9, 4:3, 1:1, etc.)
- Plan crop dimensions that keep the same proportions
Frequently Asked Questions
Swap your width and height values into the calculator (enter height as \u201cwidth\u201d and vice versa), enter your target as \u201cnew width,\u201d then swap the result back \u2014 the ratio math is symmetric.
16:9 is standard widescreen video, 4:3 is older/classic TV and monitors, 1:1 is square (common for social media), and 21:9 is ultrawide/cinematic.