Shoe Size Conversion Calculator
Easily convert between US, UK, EU, and International shoe sizes. Whether you are shopping for Nike sneakers or European loafers, our high-precision tool calculates your perfect fit based on regional standards and brand-specific logic for Men, Women, and Kids.
The Ultimate Guide to Shoe Size Conversion: US, UK, EU, and Beyond
Finding the perfect pair of shoes online can be a daunting task. With globalization, we often find ourselves looking at sneakers from the US, boots from Italy, or sandals from Japan. Each region uses a different metric, making a Shoe Size Conversion Calculator an essential tool for the modern shopper.
Why Shoe Sizes Vary Internationally
The discrepancy in sizing stems from historical measurement units. The UK and US systems are based on the "barleycorn" (1/3 of an inch), whereas the European system uses "Paris Points" (2/3 of a centimeter). Japan, more logically, uses the actual length of the foot in centimeters. Our calculator bridges these gaps by applying high-precision mathematical formulas adjusted for gender and age groups.
How to Measure Your Foot at Home
Before using the calculator, ensure you have an accurate measurement. Place your foot on a piece of paper, trace the outline, and measure the distance from the heel to the tip of your longest toe. Add approximately 0.5cm to 1cm for "wiggle room." This "Foot Length" input is the most reliable way to find your size across different brands like Nike, Adidas, and Puma.
Understanding Brand-Specific Sizing
Did you know that an Adidas US 10 might feel different than a Nike US 10? This is because of the "Last"—the 3D mold used to create the shoe. Brands like Nike tend to be true to size, while others may run narrow or small. Our calculator includes a "Brand Fit" adjustment to account for these nuances, ensuring you don't have to deal with the hassle of returns.
Kids, Men, and Women: The Scaling Differences
In the US system, men's and women's sizes are offset by approximately 1.5 sizes. A women's US 8 is roughly equal to a men's US 6.5. Children's sizing is even more complex, transitioning from "Toddler" to "Little Kid" and finally "Big Kid" sizes before reaching the adult scale. Our tool handles these transitions seamlessly, providing a "Best Fit" recommendation for every family member.