Shoe Size Converter

Yes, the shoe size converter is completely free with no signup, no usage limits, and no hidden charges. It runs entirely in your browser, so no data is sent anywhere and no account is required to convert a shoe size between sizing systems.

This tool matches your entered size against a standard conversion chart covering US, UK, EU, and centimeter foot-length sizing, finding the closest equivalent size across every system at once. The chart follows widely used standard sizing conventions rather than any single brand's proprietary chart.

Each country historically developed its own sizing system using different base units and starting points — the UK and US systems are based on barleycorn-derived increments, while the EU system, known as Paris Points, is based on two-thirds of a centimeter of foot length. There's no simple universal formula between them, which is why a lookup-based conversion is more reliable than a fixed multiplier.

Use this converter as a strong general starting point, but always check a specific brand's own size chart when one is available, since shoe fit can vary meaningfully between manufacturers even at the same labeled size. This is especially true for athletic shoes, where width and last shape differ significantly across brands.

This converter is based on standard adult sizing charts, which is the most common use case for cross-border shopping. Children's and some women's sizing use different numbering systems entirely in certain regions, so always double-check against a size chart labeled specifically for that category before ordering.