Image Aspect Ratio Calculator

Simplify width and height to a ratio or calculate a missing image dimension.

Enter an image or screen size to reduce it to its simplest width-to-height ratio.

Width

Height

Decimal inputs are normalized to at most six decimal places before simplification.

Enter width and height to find the ratio

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How to use the Image Aspect Ratio Calculator

Simple, free and instant - no sign-up required.

Type your numbers or pick dates in the input fields - everything is clearly labeled.

The calculator shows the answer as soon as it has the values it needs.

Copy the result or keep the page open while you work.

There is no sign-up and no account to manage.

Useful information about Image Aspect Ratio Calculator.

How is an aspect ratio simplified?

Whole-number dimensions are divided by their greatest common divisor. Bounded decimal inputs are normalized deterministically before simplification.

Can it calculate a missing width or height?

Yes. Enter a ratio and one known dimension; the result is rounded to the nearest whole pixel and the unrounded value is retained for context.

Does it need an image upload?

No. The primary workflow is calculator-first and uses only the dimensions you enter.

Image Aspect Ratio Calculator - EveryFileTool