Estimate bra size from band and bust measurements. Convert inches to centimeters, find cup size, compare US, UK, and EU bra size references, and view approximate sister sizes for better fit comparisons.
Inches to centimeters:
cm = inches × 2.54
Centimeters to inches:
inches = cm ÷ 2.54
Cup estimate:
cup size is based on bust minus band.
Sister size:
go up one band and down one cup, or down one band and up one cup.
Bra size conversions are useful for online shopping, international size charts, changing between US, UK, and EU sizes, comparing band and cup sizes, checking sister sizes, and converting body measurements between inches and centimeters.
Use this converter as an estimate, then check the brand’s official sizing and fit guide.
Your result estimates a bra size from the underbust and bust measurements entered. The converter shows approximate band size, cup size, US size, UK size, EU band reference, measurement conversions, and sister size options.
Bra sizing is not exact across all brands. Fit can vary by band stretch, cup shape, wire shape, style, fabric, body shape, country system, and brand grading.
Measure underbust for band size, then measure bust. The difference between bust and band helps estimate cup size.
A sister size is a nearby bra size with similar cup volume. For example, 34C is close in cup volume to 32D and 36B.
They are similar for early cup sizes, but larger cup lettering can differ between US and UK sizing systems.
Multiply inches by 2.54. For example, 32 inches is 81.28 centimeters.
No. Bra size converters provide estimates. Brand fit, style, fabric, cup shape, and body shape can all affect the final fit.