Photo Crop to Aspect Ratio Calculator

Calculate the largest centred crop that fits a target aspect ratio and show how many source pixels are removed.

🇬🇧 UK context⚡ Instant result🔒 Browser-based inputs

Source width

Source height

Target ratio width

Target ratio height

Estimated result

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Enter your figures

Use the values that match your situation and the units shown in the form.

Review the estimate

Results include the main answer plus supporting figures where useful.

Check official rules when needed

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