Aspect Ratio Calculator
Calculate and convert aspect ratios
Ratio
Presets
Ratio
16:9
1920 x 1080
16:9
What is Aspect Ratio Calculator?
Enter any width and height to find the simplified ratio. Lock it, then change one dimension and the other scales to match. Free and private — your numbers never leave your device.
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.
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