Bra Size

Enter underbust and bust in centimetres or inches. The band is the nearest even inch, with nothing added. The cup is bust minus that band, shown as US, UK, EU, FR and AU labels. Measurements stay in your browser.

Units

Underbust (in)

Bust (in)

UK size

32D

US: 32D
EU: 70D
FR: 85D
AU: 10D

32 in underbust is already an even band, so the band is 32. Nothing is added.

36 − 32 = 4 in. Rounded to 4 in, cup D.

EU 70 = 2.5 × 32 − 10. FR 85 = EU + 15. AU 10 = 32 − 22. Letters match through D. After that, US and UK labels split. This is a chart, not a fitting. Nothing you type is uploaded.

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Frequently asked questions

Do you add 4 inches?

No. The band is the underbust rounded to the nearest even inch. The old add-4 method is not used.

Is this a fitting?

No. It is not a fitting room — only a chart from two measurements. Brand charts and body shape still change how a bra feels.

Is my data sent to a server?

No. This calculator runs entirely in your browser. Nothing you type is uploaded or stored by Qivtools.