The Bra Size Calculator

About The Bra Size Calculator

The Bra Size Calculator is a free web tool for anyone who wants a starting point when shopping for a bra. Users enter their underbust and bust measurements in inches or centimeters and get a suggested band and cup size, which can be shown in US, UK, EU, French or Australia/New Zealand labels.

Beyond the calculator, the site offers a fit guide that explains what to check in the band, cups, wires and straps, plus guidance on when to try a nearby size. An optional detailed method uses six measurements and needs no photos. Separate pages cover an illustrated measuring guide, a band and cup size chart, a UK chart and a size conversion tool based on brand references.

Calculations run in the browser and measurements are not uploaded. They are saved on the device only if the user chooses to save them, and analytics cookies are optional.