UK Bra Size to Australian Bra Size Converter
Convert UK Bra Size to Australian Bra Size instantly
Australian Bra Size
Conversion Formula
1 UK = 1 AUWhere:
- UK = UK Bra Size
- AU = Australian Bra Size
What is a UK Bra Size?
The uk bra size (UK) is a unit of bra size in the uk system of measurement.
What is a Australian Bra Size?
The australian bra size (AU) is a unit of bra size in the au system of measurement.
How to Convert UK Bra Size to Australian Bra Size
Convert uk bra size to australian bra size instantly
Quick Reference:
- 1 UK = 1.000000 AU
- 1 AU = 1.000000 UK
Common UK Bra Size to Australian Bra Size Conversions
= -21.00 AU
= -17.00 AU
= -12.00 AU
= 3.00 AU
= 28.00 AU
= 78.00 AU
Conversion Reference Table
| UK Bra Size (UK) | Australian Bra Size (AU) |
|---|---|
| 1 | -21 |
| 2 | -20 |
| 3 | -19 |
| 4 | -18 |
| 5 | -17 |
| 10 | -12 |
| 15 | -7 |
| 20 | -2 |
| 25 | 3 |
| 50 | 28 |
| 75 | 53 |
| 100 | 78 |
| 250 | 228 |
| 500 | 478 |
| 1,000 | 978 |
Quick reference table showing common uk bra size to australian bra size conversions.
Real-World Bra Size Conversions
International Lingerie Shopping
When shopping from European, American, or Asian lingerie brands, converting your bra size ensures you order the right fit.
Online Bra Shopping
E-commerce sites may list bras in different sizing systems. Converting sizes helps you shop confidently from any retailer worldwide.
Travel Shopping
When buying lingerie while traveling abroad, knowing your size in the local system makes finding the perfect fit easier.
Brand Comparison
Different brands use different sizing conventions. Understanding size conversions helps compare options across international brands.
Fitting Services
Professional fitters may reference different sizing systems. Understanding conversions helps communicate your size accurately.
Gift Purchasing
When buying lingerie as a gift, accurate size conversion ensures the right fit when shopping from international brands.
Bra Size Conversion FAQs
Common Conversion Mistakes
- ⚠Confusing the direction of conversion — always check whether you are converting from UK Bra Size to Australian Bra Size or vice versa.
- ⚠Rounding too early in multi-step calculations. Keep full precision until the final result.
- ⚠Using outdated or approximate conversion factors. Our converter uses values traceable to international measurement standards.
Sources & Standards
Conversion factors on this page are based on definitions from the International Bureau of Weights and Measures (BIPM) and the National Institute of Standards and Technology (NIST). All factors are accurate to at least 6 decimal places.
Last updated: November 27, 2025