Apparel SizeShoe Size

EU to CN Shoe Size for Unisex

Snapshot

40 EU size equals 40.5 CN size. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: This result uses the selected selected cohort cohort as the profile basis.
Example: For 37 EU size, the selected cohort cohort returns 36.5 CN size under the same mapping assumptions.
Use the reverse page if you need the opposite direction with the same basis.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Interactive conversion

Converter Calculator

40.5 CN size

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Machine access

Available to apps and AI agents

EU to CN Shoe Size for Unisex can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The unisex cohort identifies the sizing system used by the conversion.

Machine-readable identifiers

Conversion family: shoe-size
Source unit: eu
Target unit: cn
Cohort: unisex

The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.

Example API request and response

POST /api/v1/convert

Request

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

Essential response

{
  "ok": true,
  "conversion": {
    "family": "shoe-size",
    "value": 40,
    "from": "eu",
    "to": "cn",
    "result": {
      "raw": 40.333336,
      "display": "40.5"
    },
    "canonicalPath": "/apparel-size/shoe-size/eu-to-cn-for-unisex/"
  }
}

Full API documentation

Explanation

EU converts to CN by first mapping EU to millimeters, then mapping millimeters to CN. Cohort profile fixed: Unisex.

From EU size to CN size, results depend on the selected selected cohort cohort and stay consistent with that cohort across table rows and calculator input.

Keep the same cohort in both directions to avoid mixing shoe-size systems that use different wearer-group mappings.

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 size	CN size
37	36.5
39	39
40	40.5
42	43
43	44.5

Questions & answers

Frequently Asked Questions

Is the reverse shoe-size direction available?

Yes. The mirror page CN to EU (Unisex) uses the inverse mapping path.

Which shoe-size cohort is used for EU to CN?

Unisex sizing is fixed for this shoe-size mapping.

How is EU size to CN size calculated?

The converter applies the formula defined for EU size to CN size, then renders rounded output for the direct answer and common-value rows.