Free Online Calculators

Bra Size Calculator

Get an estimated bra size from underbust and bust measurements, using a simple rule of thumb. Sizing varies by brand.

Calculator
Result
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Measure underbust (band) snugly around ribcage. Measure bust at fullest point, tape parallel to ground. Try multiple sizes as sizing varies by brand. This is an estimate using a simple inch-based rule of thumb, not an industry standard (band = underbust rounded to an even number, cup = bust minus band); cup letters beyond DD differ between brands and countries.
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