Bra Size Calculator
Calculate and convert your bra size across different international standards.
Bra Size Calculator
Enter your bust and band measurements to calculate your bra size.
How to Measure: Measure your band size by wrapping a tape measure snugly around your ribcage, just under your bust. For bust size, measure around the fullest part of your bust. Ensure the tape is level and not too tight.
How It’s Calculated: Band size is determined by finding the closest standard size to your underbust measurement. The cup size is calculated based on the difference between your bust and band measurements (e.g., a 2-inch difference is a B cup in US/CA).
Note: This calculator provides a starting point. Bra sizes can vary by brand and style, so a professional fitting is recommended for the best fit.
Bra Size Converter
Convert your bra size to different international standards.
Understanding Bra Sizes
Bra sizing can vary significantly across different countries and brands, making it challenging to find the perfect fit. The band size typically represents the measurement around your ribcage, just under your bust, while the cup size indicates the volume of your breasts, calculated as the difference between your bust and band measurements. For example, a 2-inch difference typically corresponds to a B cup in most systems.
International sizing standards differ: for instance, a US 34C might be a 75C in EU sizing or a 12C in AU/NZ sizing. Additionally, some regions like the UK use different cup progressions (e.g., DD instead of E). Our calculator and converter aim to simplify this process, but fit can still vary due to brand-specific cuts and styles.
Bra Size Conversion Tables
Band Size Conversion
| Band Size | FR/BE/ES | EU (Standard EN 13402) | US and UK | AU, NZ |
|---|---|---|---|---|
| XXS | 75 | 60 | 28 | 6 |
| XS | 80 | 65 | 30 | 8 |
| S | 85 | 70 | 32 | 10 |
| M | 90 | 75 | 34 | 12 |
| L | 95 | 80 | 36 | 14 |
| XL | 100 | 85 | 38 | 16 |
| XXL | 105 | 90 | 40 | 18 |
| 3XL | 110 | 95 | 42 | 20 |
| 4XL | 115 | 100 | 44 | 22 |
| 5XL | 120 | 105 | 46 | 24 |
Cup Size Conversion (Inches - US/UK/AU)
| Bust/Band Difference (in) | US Cup Size | UK/AU Cup Size |
|---|---|---|
| <1 | AA | AA |
| 1 | A | A |
| 2 | B | B |
| 3 | C | C |
| 4 | D | D |
| 5 | E or DD | DD |
| 6 | F or DDD | E |
| 7 | G or DDDD | F |
| 8 | H | FF |
| 9 | I | G |
| 10 | J | GG |
| 11 | K | H |
| 12 | L | HH |
| 13 | M | J |
| 14 | N | JJ |
Cup Size Conversion (Centimeters - EU/FR/BE/ES)
| Bust/Band Difference (cm) | Continental Europe Cup Size |
|---|---|
| 10-11 | AA |
| 12-13 | A |
| 14-15 | B |
| 16-17 | C |
| 18-19 | D |
| 20-21 | E |
| 22-23 | F |
| 24-25 | G |
| 26-27 | H |
| 28-29 | I |
| 30-31 | J |
| 32-33 | K |
How to Use Our Bra Size Calculator
Measure Bust and Band
Use a measuring tape to measure your bust and band sizes.
Select Unit
Choose whether your measurements are in centimeters or inches.
Calculate
Click Calculate to see your bra size across different regions.
How to Use Our Bra Size Converter
Select Your Size
Choose your known bra size, cup, and region.
Convert
Click Calculate to see the equivalent sizes in other regions.
Features
Bra Size Calculation
Calculate your bra size based on bust and band measurements.
Size Conversion
Convert your bra size across different international standards.
Unit Flexibility
Measure in either centimeters or inches.
Popular Use Cases
Online Shopping
Find your bra size when shopping internationally.
Travel
Convert your bra size when buying abroad.
Personal Fitting
Get a starting point for a professional bra fitting.