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DIGITAL & TECH

Aspect Ratio Calculator

Calculate a simplified aspect ratio and missing dimension from width and height.

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Free tool

Known width.

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Known height.

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Optional width for scaled-height calculation.

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Privacy-friendly: your inputs are processed locally in your browser.

Formula

Aspect ratio = width:height simplified by the greatest common divisor.

Aspect ratio = width:height simplified by the greatest common divisor.

How it works

1

Enter width and height.

2

Optionally enter a target width.

3

Review ratio and scaled height.

Important notes

Scaling preserves the original proportions when both dimensions are multiplied by the same factor.