Bra Size Calculator
Find your bra size from band and bust measurements.
Band and bust measurements translate into a size using a standard formula — a useful starting point when shopping, especially across brands where sizing can be inconsistent.
Why sizing still varies by brand
Even with an accurate measurement, cut, materials, and manufacturer sizing conventions differ enough that the same calculated size can fit differently between brands — treat this as a starting point for trying on, not a guarantee of exact fit.
Frequently asked questions
How often should I re-measure?
Body measurements can shift over time due to weight changes, so re-measuring every year or so, or after any significant body change, keeps your sizing accurate.
Should I measure over or under clothing?
Measure directly against skin (or a well-fitting, unpadded bra) for the most accurate result.