Apparel SizeShoe Size

JP (cm) to EU Shoe Size for Unisex

Snapshot

26 JP (cm) size equals 40.5 EU 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 cm cohort as the profile basis.
Example: For 24 JP (cm) size, the cm cohort returns 37.5 EU 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 EU size

Switch

Machine access

Available to apps and AI agents

JP (cm) to EU 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: jp-centimeters
Target unit: eu
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": 26,
  "from": "jp-centimeters",
  "to": "eu",
  "parameters": {
    "cohort": "unisex"
  }
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "shoe-size",
    "value": 26,
    "from": "jp-centimeters",
    "to": "eu",
    "result": {
      "raw": 40.499997975,
      "display": "40.5"
    },
    "canonicalPath": "/apparel-size/shoe-size/jp-centimeters-to-eu-for-unisex/"
  }
}

Full API documentation

Explanation

JP (cm) converts to EU by first mapping JP (cm) to millimeters, then mapping millimeters to EU. Cohort profile fixed: Unisex.

From JP (cm) size to EU size, results depend on the selected cm 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: cm cohort.
Consistency rule: calculator output and table values keep the same shoe-size cohort in both directions.

Common Conversion Values

JP (cm) size	EU size
24	37.5
25	39
26	40.5
27	42
28	43.5

Questions & answers

Frequently Asked Questions

Is the reverse shoe-size direction available?

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

Which shoe-size cohort is used for JP (cm) to EU?

Unisex sizing is fixed for this shoe-size mapping.

How does this converter compute JP (cm) size to EU size?

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