Shoe Size Converter Free Online
Convert shoe sizes between US, UK, EU, and JP/cm systems for men, women, and kids. Side-by-side chart shows all sizes at once for easy reference.
All Systems
Pro — bulk batch conversion, API access, history & favorites
API access · Priority queue · Team workspace
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How It Works
Pick Your System or Ingredient
Choose your home size system, ingredient, or input mode using the dropdowns and category buttons. Defaults are sensible so you can start typing immediately.
Enter or Pick a Value
Type a number, choose a size, or use the dual inputs (e.g. ft + in or min + sec). Conversion runs as you type — no Convert button.
See Every Equivalent
Below the main result, the All Conversions panel shows your value across every supported system or unit at once — perfect for international shopping or recipe scaling.
Shoe Size Converter Features
Men, Women, Kids
Three separate size charts. Pick the category and the dropdowns repopulate with valid sizes for that range.
4 Size Systems
US, UK, EU, JP/cm. Japan uses centimeters of foot length, which is also the underlying basis for shoe construction (Mondopoint).
Side-by-side Chart
See your size in all systems at once. Useful when shopping international brands or buying online from foreign sites.
Half Sizes
Includes half sizes (US 7, 7.5, 8…) where they exist. UK sizes are typically 0.5 sizes smaller than US for adults.
Live Conversion
Switch system or category and the result updates instantly.
100% Private
No tracking, no analytics. Pure client-side lookup.
Free vs Pro
| Feature | Free | Pro |
|---|---|---|
| Full shoe size conversion | ||
| Live conversion | ||
| All-systems result panel | ||
| Bulk CSV / Excel conversion | — | |
| REST API access | — | |
| Custom precision settings | — |
Frequently Asked Questions
For men: subtract 33 from EU size to get rough US (e.g. EU 42 ≈ US 9). For women: subtract 30 (EU 38 ≈ US 8). The relationship is not linear so use the chart for accuracy.
Yes — UK adult sizes run about 0.5 size smaller than US for men, and 2 sizes smaller for women. So a US Men's 9 ≈ UK 8.5, and a US Women's 8 ≈ UK 6.
Japan uses Mondopoint — the actual length of your foot in centimeters. A 27 cm foot wears size 27. This is the most precise sizing system because it measures you directly.
Despite the standards, brands use different "lasts" (the foot mold). A Nike US 10 may not fit like an Adidas US 10. The system numbers are nominal — always try on or check brand-specific size charts.
Yes — US Women's sizes are about 1.5 larger than US Men's for the same actual foot length. So a US Men's 8 ≈ US Women's 9.5. Useful when buying unisex sneakers.