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Shoe Size Conversion

Apparel & FootwearISO/TS 19407 International Standard

Shoe Size Conversion

Convert shoe sizes between US & Canada, UK & India, European Union (EU), Japan (cm), Mexico, and China, or find your exact shoe size from foot length measurements.

Provide your foot length or regional shoe size to convert to all international standards
Converted International Shoe Sizes

US Men: 7.5 — US Women: 9.0

Foot Length: 10" (25.4 cm / 254 mm)
US / Canada Men
7.5
US / Canada Women
9.0
UK & India
7.0
Europe (EU)
40
Japan / Mexico
25.5
China (CN)
40
Adult International Size Reference Chart:
Foot Length (in)Foot Length (cm)US MenUS WomenUKEUJapan (cm)
9.25"23.5 cm5.57.05.037.523.5
9.5"24.1 cm6.07.55.53824.0
9.625"24.4 cm6.58.06.038.524.5
9.75"24.8 cm7.08.56.53925.0
10"25.4 cm7.59.07.04025.5
10.125"25.7 cm8.09.57.54126.0
10.25"26 cm8.510.08.041.526.5
10.5"26.7 cm9.010.58.54227.0
10.625"27 cm9.511.09.042.527.5
10.75"27.3 cm10.011.59.54328.0
11"27.9 cm10.512.010.04428.5
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Understanding Shoe Size Conversion & Formula

Mathematical Formula: ISO/TS 19407 Mondopoint System & Regional Standards (US = 3 × Inches - 22 | EU = 1.5 × Length(cm) + 2)

The Shoe Size Conversion on CalculatorScale.com is engineered to deliver instant, mathematically verified calculations conforming strictly to standard institutional equations. Whether planning long-term investments, managing household budgets, tracking clinical fitness targets, analyzing academic genetics, calculating veterinary dosages, or converting dimensional units, every calculation updates dynamically in real time without lag.

Every formula used in this tool adheres to certified international standards, including World Health Organization biometric metrics, veterinary clinical guidelines, NIST physical conversion constants, and standard biological equations. Results are computed entirely client-side inside your browser with complete data privacy, ensuring your sensitive numbers and statistics never leave your device.

Our calculators are 100% free with no registration, subscriptions, or paywalls required. You can toggle between imperial and metric units, customize input parameters, export calculation summaries, or embed this calculator directly into your own website or blog.

How to Use the Shoe Size Conversion

  1. 1 Choose the demographic category: Adults, Kids (5-12), or Infants (0-4).
  2. 2 Enter your foot length (in inches, cm, or mm) or your known regional shoe size.
  3. 3 Click the green "Convert Shoe Size ▶️" button to view converted sizes for US Men/Women, UK, EU, Japan, and China.
FAQ & Help 4 questions

Shoe Size Conversion — Frequently Asked Questions

Q1 How do US, UK, EU, and CM shoe sizes compare? ▾

US Men's sizes are typically 0.5 to 1 size larger than UK sizes, while US Women's sizes are roughly 1.5 to 2 sizes larger than Men's sizes. EU sizes use the Paris point system (1 point = 2/3 cm), while CM/Japan sizes directly correspond to foot length in centimeters.

Q2 How do you accurately measure your foot length at home? ▾

Place a piece of paper on a hard floor against a wall. Stand with your heel against the wall, trace the longest toe tip with a pencil held vertically, and measure the length from the paper edge to the mark in centimeters or inches.

Q3 What do shoe width letters (A, B, C, D, E, 2E, 4E) mean? ▾

B is standard width for women and narrow for men. D is standard width for men and wide for women. 2E (EE) and 4E (EEEE) represent extra-wide fittings.

Q4 Why do shoe sizes differ across brands? ▾

Shoe manufacturers construct shoes around proprietary wooden lasts with distinct toe box shapes, arch contours, and instep heights, causing slight sizing variances between athletic and dress shoes.

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