Shoe Size Converter
Use this free Shoe Size Converter to quickly get accurate results in seconds, free and instantly offline with no signup required ever, trusted by professionals in Austin, Chicago, Miami, Denver, Seattle, and New York for reliable daily use without accounts, subscriptions, limits, or delays on any device for everyday personal and business workflows daily.
Convert shoe sizes between US, UK, EU, and mondopoint for men, women, and kids with this free shoe size converter across brands.
Calculator Inputs
About Shoe Sizes
Use this free Shoe Size Converter to quickly get accurate results in seconds, free and instantly offline with no signup required ever, trusted by professionals in Austin, Chicago, Miami, Denver, Seattle, and New York for reliable daily use without accounts, subscriptions, limits, or delays on any device for everyday personal and business workflows daily.
Shoe Size Converter — US, UK, EU, and Mondopoint in One Tool: Shoe sizing systems worldwide all describe the same physical foot, but use different numbering schemes. This converter translates between US Men's, US Women's, UK, EU, and Mondopoint (centimeter foot length) using a mathematical model centered on the Mondopoint system. US Men's size 6 corresponds to approximately 24.0 cm foot length, with each full US size spanning about 0.85 cm. This free tool converts between all systems instantly, running offline with no signup required ever and returning results in seconds.
The conversion model works by first converting the input size to US Men's as a common pivot, then deriving foot length in centimeters. From there, every other system is calculated: US Women's adds 1.5 sizes, UK subtracts 0.5, and EU uses centimeters multiplied by 1.5 plus 2. The result is rounded to the nearest half size, which matches the standard retail increment used by most brands.
Brand variation is a real factor that no converter can fully eliminate. Lasts (foot-shaped molds) differ in width, toe shape, and volume between Nike, Adidas, New Balance, and others. A Nike US 10 may feel tighter than an Adidas US 10 despite the same nominal size. Treat converted values as a reliable starting point and check the specific brand's size chart for expensive purchases.
The Mondopoint system, formalized as ISO 9407, is the only system that measures foot length directly in centimeters. Military boots, athletic footwear, and ski boots frequently use Mondopoint. An Austin parent buying $120 children's shoes from a UK retailer can verify the centimeter measurement matches their child's actual foot length. A Denver hiker choosing between $250 boot models from different brands uses the CM value for consistent comparison.
All calculations happen locally in your browser with zero network transmission. Whether you are a Miami bride confirming EU sizes for $3,000 designer heels, a Seattle shopper cross-checking UK to US conversions for $150 running shoes, or a New York buyer managing a $5,000 inventory order, this free tool converts shoe sizes instantly offline with no signup required ever.
Where it is used
An Austin parent ordering $120 kids' shoes from a UK site, a Chicago runner comparing EU 43 to US 10 for $180 Nikes, a Miami bride finding EU 38 heels for her $3,000 wedding shoes, a Denver hiker verifying US 11 to EU 45 for $250 boots, a Seattle shopper converting UK 8 to US 9 for $150 Merrells, and a New York fashion buyer cross-referencing EU 39 to US 8.5 for a $5,000 bulk order.
How to use the Shoe Sizes
- Size — enter the value (e.g. 9).
- Size System — enter the value.
- Calculate — press the Calculate button to see the result instantly above.
Formula
Mondopoint pivot: foot cm ≈ 24 + 0.8467 × (US Men − 6); systems derived from cm.
Examples
US Men's 9
EU 40
UK 7
Frequently Asked Questions
- Why do conversions differ between brands?
- Lasts (foot forms) differ in width and toe shape, and brands round differently. The math here matches standard charts within half a size. Always check brand-specific charts for expensive purchases.
- Is US Women's really men's plus 1.5?
- Yes — that is the industry standard offset (e.g. W7.5 = M6). Widths differ (B vs D), which numbers alone cannot capture.
- What is Mondopoint?
- The ISO system naming sizes directly in foot-length centimeters (e.g. 270 = 27.0 cm). It is the only system without conversion ambiguity because it measures the foot directly.
- How do I measure my foot length at home?
- Place your foot on a piece of paper, trace the outline, and measure from heel to longest toe in centimeters. Do this in the evening when feet are slightly swollen for the most accurate size.
- Does this work for kids' shoe sizes?
- The mathematical model scales to all ages. However, kids' sizing systems vary more by brand, so the converted value is an approximation. When in doubt, measure the foot in centimeters.
- Why are EU sizes whole numbers while US sizes use halves?
- EU sizes correspond to Paris Points (each 2/3 cm), while US sizes use the barleycorn system (each 1/3 inch). The different base units produce different decimal patterns.