International bra size calculator

This tool can help you to determine your bra size in different countries. It only requires two measurements, the bust girth and underbust girth. This tool also calculates the breast volume and weight (rough estimate).

To measure the bust girth and underbust girth you need a soft tape-measure. You can take the measurements in inches (in) or centimeters (cm). The tape measure should be horizontally all the way along. The measurements can be entered as fractions (eg: 32.6 in or 82.8 cm). Do not add additional inches or centimeters, our calculator will do that for you.
  • Bust girth
    Measure around the fullest part of your breasts and do not squish them.

  • Underbust girth
    Measure around your chest under your bust, at the level where the lowest part of your bra should sit.
Bra sizes usually consist of a number, indicating a band size around the woman's torso, and one or more letters indicating the breast cup size, for example 34B. The cup size letters are often AA, A, B, C, etc., where AA is the smallest cup size.

Breast cup sizes

While care has been taken to render the information accurately, there is no warranty that the information shown here matches your situation exactly. The converted bra sizes found on this website should be considered as just a guideline. Within a country most brands follow a basic standard measurement system. But some may deviate from these standards. There is no organization enforcing these standards. You should always wear the bra and make sure it really fits.

Input international bra size calculator:

Bust girth *: Help     Bust girth and underbust girth
Underbust girth *: Help    
* = required         

Output international bra size calculator:

Bra sizing system: EN 13402
Flag Country / Continent Bra size
Flag Europe Europe -
Flag Austria Austria
Flag Belarus Belarus
Flag Bosnia and Herzegovina Bosnia and Herzegovina
Flag Bulgaria Bulgaria
Flag Croatia Croatia
Flag Czech Republic Czech Republic
Flag Denmark Denmark
Flag Estonia Estonia
Flag Finland Finland
Flag Germany Germany
Flag Greece Greece
Flag Hungary Hungary
Flag Iceland Iceland
Flag Israel Israel
Flag Korea, Republic of Korea, Republic of
Flag Latvia Latvia
Flag Lithuania Lithuania
Flag Mongolia Mongolia
Flag Netherlands Netherlands
Flag New Zealand New Zealand
Flag Norway Norway
Flag Romania Romania
Flag Russia Russia
Flag Serbia Serbia
Flag Slovakia Slovakia
Flag Slovenia Slovenia
Flag Sweden Sweden
Flag Switzerland Switzerland
Flag Turkey Turkey
Flag Ukraine Ukraine
Flag Japan Japan -

Bra sizing system: France
Flag Country / Continent Bra size
Flag Andorra Andorra -
Flag France France
Flag Belgium Belgium
Flag Monaco Monaco
Flag Spain Spain
Flag Portugal Portugal

Bra sizing system: UK
Flag Country Bra size
Flag Australia Australia -
Flag India India
Flag Indonesia Indonesia
Flag Ireland Ireland
Flag South Africa South Africa
Flag United Kingdom United Kingdom

Bra sizing system: US
Flag Country Bra size
Flag United States United States -
Flag Canada Canada
Flag Mexico Mexico

Bra sizing system: China
Flag Country Bra size
Flag China China -
Flag Hong Kong Hong Kong
Flag Taiwan Taiwan

Bra sizing system: Italy
Flag Country Bra size
Flag Italy Italy (cup size based on UK system) -

Breast weight and volume
Cup diameter -
Breast volume (=PI*CUPDIAMETER3/12) -
Weight of one breast (=0.0009 kg/cm3 * Breast volume) -
Weight of both breasts (=2 * Weight of one breast) -