About The Bra Size Calculator

A useful starting point

We built this independent tool to make measuring, interpreting bra labels and checking fit easier. A size label is the start of choosing a bra, not the end.

This independent developer project is free and primarily serves people shopping in the United States. The site is in English, starts with US sizing, and offers UK, EU, FR and AU/NZ label references. Your unit and system choices are remembered in this browser.

Transparent limits

We explain our calculation, sources and product choices. We do not claim certification, a universal accuracy percentage or professional fitting consultation. There are no paid product placements or affiliate recommendations in this release.

Our method page explains each calculation step so you can check how your result was reached. This website does not provide personal fitting consultations.

Contact the developer

For website issues or privacy questions, email contact@thebrasizecalculator.com. Please do not send intimate photos or body measurements.