Apparel SizeBra Size

FR Band to US Band Bra Band for Comfort Fit

Snapshot

80 FR Band equals 25.6 US Band. 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 fit profile mapping as the profile basis.
Example: For 70 FR Band, the selected fit profile mapping returns 21.7 US Band under the same fit 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

25.6 US Band value

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Machine access

Available to apps and AI agents

FR Band to US Band Bra Band for Comfort Fit can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The comfort-fit identifier specifies the fit profile used by the size conversion.

Machine-readable identifiers

Conversion family: bra-size
Source unit: fr-band
Target unit: us-band
Fit: comfort-fit

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": "bra-size",
  "value": 80,
  "from": "fr-band",
  "to": "us-band",
  "parameters": {
    "fit": "comfort-fit"
  }
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "bra-size",
    "value": 80,
    "from": "fr-band",
    "to": "us-band",
    "result": {
      "raw": 25.5905511811,
      "display": "25.6"
    },
    "canonicalPath": "/apparel-size/bra-size/fr-band-to-us-band-for-comfort-fit/"
  }
}

Full API documentation

Explanation

FR Band converts to US Band by normalizing to underbust circumference in millimeters, then remapping to the destination system. Fit profile fixed: Comfort Fit.

FR Band to US Band is fit-bound here: the selected selected fit profile mapping controls the conversion path used by calculator and reference table.

Keep the same fit profile in both directions to avoid mixing size mappings that use different apparel allowances.

Method & Size Mapping

Model basis: output depends on the selected fit profile and follows the same fit mapping in both directions.
Profile reference: selected fit profile.
Consistency rule: calculator output and table values keep the same fit profile in both directions.

Common Conversion Values

FR Band value	US Band value
70	21.7
75	23.6
80	25.6
85	27.6
90	29.5

Questions & answers

Frequently Asked Questions

Is the reverse bra-band direction available?

Yes. The mirror page US Band to FR Band (Comfort Fit) uses the inverse mapping path.

What fit profile is used here?

Comfort Fit.

What formula is used for FR Band to US Band?

The converter applies the formula defined for FR Band to US Band, then renders rounded output for the direct answer and common-value rows.