Aspect Ratio Calculator

Type a width and height, get the reduced ratio (1920 × 1080 → 16:9), visualise it, scale it to a target, and parse a batch in one go. Live, in your browser, no upload.

Width Height Lock ratio

Simplified ratio — —

Preview

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Common presets

Scale to target

Keep the current ratio; pick a target on one axis, the other is computed.

New width New height

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Batch parse one dimensions string per line · e.g. 1920x1080

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