Apparel SizeHat Size

US Fitted to Head Circumference (in) Hat Size for Standard Fit

Snapshot

7.3 US Fitted equals 22.78 Head Circumference (in).

  • Reference basis: This result uses the selected in mapping as the profile basis.
  • Example: For 6.8 US Fitted, the in mapping returns 21.21 Head Circumference (in) 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.

22.78 Head Circumference (in) value

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API and AI agent access

US Fitted to Head Circumference (in) Hat Size for Standard Fit. fit: standard-fit.

Machine-readable identifiers

Conversion family
hat-size
Source unit
us-fitted
Target unit
circumference-inches
Fit
standard-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": 7.25,
  "from": "us-fitted",
  "to": "circumference-inches",
  "parameters": {
    "fit": "standard-fit"
  }
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "hat-size",
    "value": 7.25,
    "from": "us-fitted",
    "to": "circumference-inches",
    "result": {
      "raw": 22.7765467385,
      "display": "22.78"
    },
    "canonicalPath": "/apparel-size/hat-size/us-fitted-to-circumference-inches-for-standard-fit/"
  }
}
API, OpenAPI and WebMCP documentation

Explanation

US Fitted converts to Head Circumference (in) using head circumference in millimeters. Fit profile: Standard 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: in.
  • Consistency rule: calculator output and table values keep the same fit profile in both directions.

Common Conversion Values

US Fitted valueHead Circumference (in) value
6 3/4 21.21
7 21.99
7 1/4 22.78
7 1/2 23.56
7 3/4 24.35