Shoe Size Conversion

Approximate US men’s size to EU and UK sizes.

Shoe Size Conversion helps you approximate US men’s size to EU and UK sizes. Enter us men's size, review the breakdown, and use the guidance below to understand what the number means — and what it does not. What the Shoe Size Conversion calculator does Shoe Size Conversion is built for everyday questions — shopping, home, travel, hobbies, and tech. Approximate US men’s size to EU and UK sizes. You enter us men's size, then Simple Calculators computes the result instantly. Defaults are chosen to be easy to read — change any field to match your situation. How the math works Enter your US men’s size (half sizes allowed). EU size ≈ US size × 1.27 + 31.3, rounded to the nearest whole size; UK size = US size − 0.5; US women’s size ≈ men’s size + 1.5. Foot length is a rough estimate in millimeters. These are adult averages — brands vary, so check each maker’s own chart. The formula: EU ≈ US men’s size × 1.27 + 31.3; UK ≈ US men’s size − 0.5. US women’s size is about 1.5 larger than the men’s size for the same foot.