Last updated: July 2026
This tool and chart are for general shopping guidance only. They are not medical advice, a diagnostic tool, or a substitute for a professional, in-person bra fitting.
Our calculator and chart apply a standard band-and-cup formula to the two measurements you provide. Neither can account for breast shape, tissue density, asymmetry, or how a specific brand's pattern is cut — all of which affect real-world fit.
Sizing labelled 34B by one manufacturer can fit noticeably differently from a 34B made by another, even though both sit in the same chart cell. Always check a brand's own size chart and, where possible, try before you buy.
If you have concerns about breast pain, rapid size change, asymmetry, or any other physical symptom, please consult a doctor. This site addresses clothing fit only and should not be used to assess health conditions.
By using this calculator and chart you accept that BreastSizeCalculator.com is not responsible for purchasing decisions, discomfort, returns, or any other outcome connected to relying on the result shown.
Reach us anytime through our contact page.