Bra Size Converter

Convert between bra band sizes across different regions

Our free online bra size converter supports 5 different units with instant, accurate results. All conversion factors are based on definitions from the International Bureau of Weights and Measures (BIPM) and verified against NIST standards. Results are accurate to 6 or more decimal places.

Popular Bra Size Conversions

All Bra Size Conversions

Convert Bra Size Units

Last updated: November 27, 2025