Apparel SizeHat Size

Head Circumference (cm) to US Fitted Hat Size for Loose Fit

Snapshot

58 Head Circumference (cm) equals 7.3 US Fitted.

  • Reference basis: This result uses the selected cm mapping as the profile basis.
  • Example: For 54 Head Circumference (cm), the cm mapping returns 6.8 US Fitted under the same fit assumptions.

Interactive conversion

Converter Calculator

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

7.3 US Fitted value

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API and AI agent access

Head Circumference (cm) to US Fitted Hat Size for Loose Fit. fit: loose-fit.

Machine-readable identifiers

Conversion family
hat-size
Source unit
circumference-centimeters
Target unit
us-fitted
Fit
loose-fit

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": "hat-size",
  "value": 58,
  "from": "circumference-centimeters",
  "to": "us-fitted",
  "parameters": {
    "fit": "loose-fit"
  }
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "hat-size",
    "value": 58,
    "from": "circumference-centimeters",
    "to": "us-fitted",
    "result": {
      "raw": 7.26849346404,
      "display": "7.3"
    },
    "canonicalPath": "/apparel-size/hat-size/circumference-centimeters-to-us-fitted-for-loose-fit/"
  }
}
API, OpenAPI and WebMCP documentation

Explanation

Head Circumference (cm) converts to US Fitted using head circumference in millimeters. Fit profile: Loose Fit.

Model estimate based on head circumference, 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 fit profile and follows the same fit mapping in both directions.
  • Profile reference: cm.
  • Consistency rule: calculator output and table values keep the same fit profile in both directions.

Common Conversion Values

Head Circumference (cm) valueUS Fitted value
54 6.8
56 7
58 7.3
60 7.5
62 7.8