AppAdd

Aspect Ratio Calculator

Find the simplified aspect ratio of a width and height, or work out the missing side for a given ratio.

Your files stay on your device.

Ratios are reduced by their greatest common divisor, so 1920 × 1080 becomes 16:9.

How to use it

  1. Enter a width and a height to find their simplified ratio.
  2. Or switch to the missing-side mode, enter a ratio such as 16:9 and one known side.
  3. Read the ratio or the missing dimension.
  4. Copy the result.

Examples

Reduce a size
Input:1920 × 1080
Result:16:9
Find the height
Input:Ratio 16:9, width 1000
Result:1000 × 562.5 (563 when rounded to whole pixels)

What does Aspect Ratio Calculator do?

Aspect Ratio Calculator reduces a width and height to their simplest ratio, or finds the missing side when you know a ratio and one side.

How does Aspect Ratio Calculator work?

It divides width and height by their greatest common divisor, or scales the known side by the ratio. The arithmetic runs in your browser and no file is involved.

Is my data uploaded?

No. The numbers you enter stay in your browser.

Which formats and inputs does Aspect Ratio Calculator support?

Inputs: A width and a height as whole numbers; Or a ratio such as 16:9 plus either a width or a height. Output: The simplified ratio with its decimal value and orientation, or the missing dimension.

What are the limits and limitations of Aspect Ratio Calculator?

Limits: reducing a size whole numbers of 1 or more. The missing-side mode can return decimals, so it also shows the value rounded to whole pixels.

More questions

How is the ratio simplified?

Width and height are divided by their greatest common divisor, so 1920 by 1080 becomes 16:9.

Related tools