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Aspect Ratio Calculator — Find Missing Dimension or Simplify a Ratio
Enter two of width, height and ratio to solve for the missing one, or enter any pixel dimensions to see them simplified to a standard ratio (1920×1080 simplifies to 16:9) — useful for resizing an image or video frame without distorting it, or identifying what standard ratio a given resolution actually is.
How to use Aspect Ratio Calc
- Enter any two of width, height or ratio.
- Read the calculated missing value.
- Or enter pixel dimensions to see the simplified ratio.
Frequently asked questions
- How do I resize an image without distorting it?
- Keep the same ratio between width and height as the original — enter the original dimensions to get the ratio, then use that ratio to solve for your new target width or height.
- What common ratios should I recognize?
- 16:9 (widescreen video), 4:3 (older displays), 1:1 (square, social posts), and 21:9 (ultrawide) cover most common use cases.
- Does it work for print dimensions too, not just screens?
- Yes — the ratio math is unit-agnostic, so it works the same for inches or centimeters as it does for pixels.
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