Apparel SizeShoe Size

EU to US Shoe Size for Unisex

Snapshot

40 EU size equals 7.5 US size.

  • Reference basis: This result uses the selected selected cohort cohort as the profile basis.
  • Example: For 37 EU size, the selected cohort cohort returns 5 US size under the same mapping assumptions.

Interactive conversion

Converter Calculator

Decimals: 1.5 or 1,5. Fractions: 1/2. Scientific notation: 1e3. Write 1000 without grouping separators.

7.5 US size

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API and AI agent access

EU to US Shoe Size for Unisex. cohort: unisex.

Machine-readable identifiers

Conversion family
shoe-size
Source unit
eu
Target unit
us
Cohort
unisex

Use these identifiers in the API request. Sources and model limits also apply to software clients.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "shoe-size",
  "value": 40,
  "from": "eu",
  "to": "us",
  "parameters": {
    "cohort": "unisex"
  }
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "shoe-size",
    "value": 40,
    "from": "eu",
    "to": "us",
    "result": {
      "raw": 7.42519813287,
      "display": "7.5"
    },
    "canonicalPath": "/apparel-size/shoe-size/eu-to-us-for-unisex/"
  }
}
API, OpenAPI and WebMCP documentation

Explanation

EU converts to US using the foot-length model in millimeters. Cohort: Unisex.

Model estimate based on foot length, not a fit guarantee. No manufacturer chart is established for this model; compare your measurement with the brand’s chart.

Method & Size Mapping

  • Model basis: output depends on the selected shoe-size cohort and follows the same cohort mapping in both directions.
  • Profile reference: selected cohort cohort.
  • Consistency rule: calculator output and table values keep the same shoe-size cohort in both directions.

Common Conversion Values

EU sizeUS size
37 5
39 6.5
40 7.5
42 9
43 10