Apparel SizeBra Size

FR Band to Underbust (in) Bra Band for Standard Fit

Snapshot

80 FR Band equals 25.59 Underbust (in).

  • Reference basis: This result uses the selected in mapping as the profile basis.
  • Example: For 70 FR Band, the in mapping returns 21.65 Underbust (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.

25.59 Underbust (in) value

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API and AI agent access

FR Band to Underbust (in) Bra Band for Standard Fit. fit: standard-fit.

Machine-readable identifiers

Conversion family
bra-size
Source unit
fr-band
Target unit
underbust-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": "bra-size",
  "value": 80,
  "from": "fr-band",
  "to": "underbust-inches",
  "parameters": {
    "fit": "standard-fit"
  }
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "bra-size",
    "value": 80,
    "from": "fr-band",
    "to": "underbust-inches",
    "result": {
      "raw": 25.5905511811,
      "display": "25.59"
    },
    "canonicalPath": "/apparel-size/bra-size/fr-band-to-underbust-inches-for-standard-fit/"
  }
}
API, OpenAPI and WebMCP documentation

Explanation

FR Band converts to Underbust (in) using underbust circumference in millimeters. Fit profile: Standard Fit.

Model estimate based on underbust circumference, not a fit guarantee. No manufacturer chart is established for this model; compare your measurement with the brand’s chart. Cup size is not calculated.

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

FR Band valueUnderbust (in) value
70 21.65
75 23.62
80 25.59
85 27.56
90 29.53