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Tool reference

Aspect Ratio Calculator: instructions, examples and limits

Find the simplest width-to-height ratio.

Open Aspect Ratio Calculator
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What it does

Reduces integer width and height by their GCD to express the simplest ratio.

Worked example

1920 × 1080 → 16:9.

The example demonstrates the operation. For file-based tools, results depend on the selected file and options.

How the result is produced

Reduces integer width and height by their GCD to express the simplest ratio.

Important limits

Positive safe-integer dimensions only. This is a numeric tool; no image is required.

Choosing the next step

Use Resize when the dimensions are the problem, Compress when the bytes are the problem, and Metadata Remover when the file contains information you do not want to distribute. Format conversion is a separate choice: JPG is usually compact for photos, PNG keeps transparency, and WebP can be a useful modern compromise.

Batch Image StudioResize, compress and convert an image collection in one local pass.Image CompressorRe-encodes raster pixels with a selected JPEG or WebP quality level.Image ResizerResamples pixels to a target width and height.

See a mismatch between these instructions and the tool? Report a correction with a non-sensitive example.