Apparel SizeBra Size

US Band to UK Band Bra Band for Support Fit

Snapshot

34 US Band equals 34 UK 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 30 US Band, the selected fit profile mapping returns 30 UK 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

34 UK Band value

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Machine access

Available to apps and AI agents

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

Machine-readable identifiers

Conversion family: bra-size
Source unit: us-band
Target unit: uk-band
Fit: support-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": 34,
  "from": "us-band",
  "to": "uk-band",
  "parameters": {
    "fit": "support-fit"
  }
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "bra-size",
    "value": 34,
    "from": "us-band",
    "to": "uk-band",
    "result": {
      "raw": 34,
      "display": "34"
    },
    "canonicalPath": "/apparel-size/bra-size/us-band-to-uk-band-for-support-fit/"
  }
}

Full API documentation

Explanation

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

For US Band to UK Band, the active selected fit profile fit mapping determines the conversion constants applied to every value.

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

US Band value	UK Band value
30	30
32	32
34	34
36	36
38	38

Questions & answers

Frequently Asked Questions

Is the reverse bra-band direction available?

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

What fit profile is used here?

Support Fit.

What formula is used for US Band to UK Band?

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