Bra Size Calculator
Bra Size Calculator
Get accurate bra size measurements with international conversions and fit guidance
Measure snugly under your bust, where the band sits
Measure around the fullest part of your bust
How to Measure
Finding the Right Support: The Bra Size Calculator
Finding a comfortable and supportive bra is a common challenge, as studies show that a large majority of women wear the wrong size. A proper fit is essential not only for comfort and appearance but also for breast health. A bra that is too tight can restrict circulation, while one that is too loose fails to provide adequate support. This calculator provides a starting point for finding your correct size by using two key measurements: the band size (underbust) and the bust size (fullest part). The difference between these two measurements determines the cup size.
How Bra Size is Calculated
The two components of a bra size are the band size and the cup size.
- Band Size: This is determined by your underbust measurement. Typically, you round the measurement to the nearest even number.
- Cup Size: This is calculated by finding the difference between your bust measurement and your band measurement. Each inch of difference corresponds to a letter size (e.g., 1 inch = A cup, 2 inches = B cup, etc.).
Disclaimer: This calculator provides an estimated size based on standard US sizing. Sizes can vary significantly between brands. It's always best to get professionally fitted or try on different sizes and styles to find your perfect fit.