# Bra Size Calculator

> Determine your recommended bra band and cup size based on your underbust and bust measurements using standard US sizing.

**URL:** https://www.calculatoranswers.com/bra-size-calculator
**Category:** Health

## Quick Answer

Calculate your estimated bra band and cup size. Enter your underbust (band) and bust measurements to find your US/UK size.

## Definition

A bra size calculator is a fitting utility designed to estimate a person's correct brassiere size using physical body measurements. The sizing system consists of a band size (computed by adjusting the underbust circumference to an even number) and a cup size (determined by the difference between the fullest part of the bust and the band size). Standard US sizing maps each inch of difference to alphabetical cups, starting with AA for zero difference. Women use this calculator to find a comfortable starting size, though actual fit varies by brand, style, and breast shape.

## How to Use

1. **Measure underbust** — Wrap a tape measure snugly around your ribcage directly under your bust, and enter this in inches.
2. **Measure fullest bust** — Wrap the tape measure loosely around the fullest part of your chest, and enter this in inches.
3. **Read recommended size** — Review your estimated band size, cup size, and combined bra size.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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