Aspect Ratio Calculator
Calculate aspect ratios, resize proportionally, and explore common resolutions.
Calculate Ratio from Dimensions
Calculate Dimension from Ratio
About Aspect Ratio Calculator
Aspect Ratio Calculator helps you maintain correct proportions when resizing images, videos, or UI elements. Enter width and height to find the aspect ratio, or lock a ratio and enter one dimension to calculate the other.
Maintaining aspect ratio prevents distortion when resizing media. Common ratios like 16:9 (widescreen video), 4:3 (standard), 1:1 (square), and 3:2 (photography) are available as presets.
Also useful for CSS aspect-ratio property values and finding equivalent resolutions (e.g., what's the 720p equivalent of a custom resolution?).
Features
- ✓Calculate ratio from any width and height
- ✓Resize proportionally by entering one dimension
- ✓Common ratio presets (16:9, 4:3, 1:1, 3:2)
- ✓Simplified ratio display (e.g., 16:9 not 1920:1080)
Common Use Cases
- →Resizing images without distortion
- →Finding correct video dimensions at different resolutions
- →Setting CSS aspect-ratio values for responsive elements
- →Cropping images to a specific aspect ratio