Bra Size Calculator & Converter
Bra Size Calculator & Converter
Find your perfect fit and international size equivalents instantly.
in
Measure snugly around your ribcage, just under your bust.
in
Measure loosely around the fullest part of your bust.
Your Estimated US/UK Size
32C
International Equivalents
Europe (EU)
70C
France/Spain (FR)
85C
Australia/NZ (AU)
10C
Finding Your Perfect Fit
Did you know that studies show nearly 80% of women are wearing the wrong bra size? Wearing an ill-fitting bra can lead to back pain, poor posture, and general discomfort. Our Bra Size Calculator uses standard modern sizing algorithms to help you find your true band and cup size.
How are Bra Sizes Calculated?
A bra size consists of two parts: the Band Size (a number like 34, 36, 38) and the Cup Size (a letter like A, B, C, D). The band size is calculated using your underbust measurement, while the cup size is determined by the difference between your overbust and your underbust.
Frequently Asked Questions
How do I take accurate measurements?
Wear an unpadded, well-fitting bra. Use a soft measuring tape. For the underbust, measure directly under your breasts, keeping the tape snug and parallel to the floor. For the overbust, measure around the fullest part of your breasts, keeping the tape somewhat loose.
Why is my calculated size different from what I wear?
Sizing can vary significantly across different brands and countries. Additionally, different materials and bra styles (plunge, push-up, balconette) fit differently. This calculator gives you an excellent starting point, but trying on different “sister sizes” is always recommended.