Shoe Size Converter

Estimate adult EU, UK and US shoe sizes from one size or foot length.

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Behind the answer

How to calculate

Sizes are estimated through foot length with a 1.5 cm allowance, then rounded to the nearest half size.

An EU 42 is approximately a UK 8 in this general conversion model.

Adult sizing is not universal. Brand, model, width and intended fit can change the right size; measure both feet and check the maker’s chart.

Results display up to 8 decimal places; exported numbers preserve calculation precision. This is a calculation summary, not an official certificate.