Aspect Ratio Calculator
Calculate and convert aspect ratios
Ratio
Presets
What is Aspect Ratio Calculator?
The Aspect Ratio Calculator determines the aspect ratio of any dimensions and lets you resize while maintaining proportions. Perfect for designers, photographers, and video editors who need to fit content to specific display formats.
How to use
- Enter width and height values to calculate the simplified aspect ratio (e.g., 1920x1080 gives 16:9).
- Lock the ratio, then change either width or height — the other dimension updates proportionally.
- Use the preset ratios (16:9, 4:3, 1:1, 21:9) for quick calculations or enter custom ratios.
Result
Enter 1920x1080 to see the ratio is 16:9. Lock the ratio and change width to 1280 — height auto-calculates to 720. Common presets: 4:3 for presentations, 16:9 for video, 1:1 for social media.