Best Bra Size Converter - Get Perfect International Size

3-Step Bra Size Converter – Get Your Perfect International Match Now!

Ever ordered your usual bra size from an international store and found it didn’t fit at all? That’s the challenge every country does sizing a little differently. Our Bra Size Converter helps you make sense of it all. Without a proper bra size comparison, many women end up with poor fit and discomfort.

🔄 Bra Size Converter

Easily convert your bra size between countries!

That’s exactly why we built this free, easy-to-use Bra Size Converter.

Our free Bra Size Converter helps you convert bra sizes online quickly and accurately. Instantly compare sizes across international bra charts and find your true bra size for better support and confidence wherever you shop.

Whether you’re browsing online shops or traveling abroad, our Bra Size Converter gives you the confidence to get it right no guessing, no awkward returns.

How to Convert Your Bra Size

Finding the right bra size across different sizing systems can be challenging. A UK size may not match a US or EU label, and international differences in band and cup measurements can easily lead to the wrong fit. That’s where our Bra Size Converter helps. It offers a fast, accurate way to convert bra sizes online across major regional standards including UK, US, EU, AUS, FR, and Japan.

How to Use Our Bra Size Converter

Our bra size conversion tool is simple and user-friendly. Follow these steps to find your perfect fit:

Illustration showing how to measure bust and band for accurate bra size converter results. — Follow this visual guide to accurately measure your band and bust for the Bra Size Converter.

Step 1: Measure Your Band Size

Use a soft measuring tape around your ribcage, just under your bust.
Ensure the tape is snug but not tight.
Round to the nearest whole number (in inches or centimeters).

Step 2: Measure Your Bust Size

Wrap the tape around the fullest part of your bust.
Keep the tape parallel to the ground for accuracy.

Step 3: Determine Your Current Bra Size

Subtract your band size from your bust measurement to find your cup size.
Example: If your band is 34 inches and bust is 37 inches, the difference is 3 inches, making your size 34C (US/UK).

You can also try our Bra Size Calculator for a full measurement-based fit, or explore alternative fits using our Sister Size Finder.

Step 4: Select Your Country’s Sizing System

Choose your current size standard (e.g., UK, US, EU).

Step 5: Get Your Converted Size

Instantly see equivalent sizes in other countries.

This converter is ideal for comparing UK to US bra sizes, understanding EU sizing, and navigating global bra size charts with ease.

For further background on global sizing standards, visit the ISO international size standard overview. It explains how clothing sizes vary by region and offers insights into how sizing systems are developed and maintained.

Bra Size Conversion Chart

Bra sizes are not standardised worldwide. A UK bra size might not match a US bra size, and EU or French sizes can look completely different. This creates confusion when shopping for bras across countries or converting sizes between brands. That’s why apart from our Bra size converter we’ve created this accurate and easy-to-use bra size conversion chart.

Use this bra size chart to:

Convert bra sizes from UK to US, EU to UK, AUS to US, and more
Find your matching international bra size
Understand how band and cup sizes align across sizing systems

Band Size	UK Bra Size	US Bra Size	EU Bra Size	AUS Size	FR Size	JP Size
30	30B	30B	65B	8B	80B	B65
32	32C	32C	70C	10C	85C	C70
34	34D	34D	75D	12D	90D	D75
36	36DD	36DD (E)	80E	14DD	95E	E80
38	38E	38DDD (F)	85F	16E	100F	F85

Note: Bra sizing can vary slightly between brands. Always use a size guide when available and consider trying on for the best fit.

By using this chart alongside our Bra Size Converter, you can easily compare bra sizes online and shop internationally without confusion. You can also double-check your fit with our Bra Calculator to make sure you’re wearing the correct size.

About the Author

This guide was created by the Bra Calculators Editorial Team, a group of writers and fit specialists passionate about helping you find your best bra size with real data, not fluff.

About Us
Contact

Frequently Asked Questions

No. Cup volumes vary between countries. A DD in the UK is not always the same as a DD in the US or EU. Always use a conversion chart or online converter for reliable sizing.

To convert a UK bra size to a US size, keep the band number the same but adjust the cup. For example, a UK 34DD is usually a US 34DD or E. Use our Bra Size Converter for fast and accurate results.

UK bra sizes use inches for bands, while EU sizes use centimetres. For example, a UK 34 band is an EU 75. The cup sizes may also vary. You can use our Bra Size Converter or Always use a reliable conversion chart to avoid errors.

No, French bra sizes are typically 15 numbers higher than EU sizes. If your EU band size is 75, your French size would be 90. The cup sizes are usually consistent between the two.

Use our Bra Size Converter to match your current size to other country standards, including UK, US, EU, AUS, FR, and JP. It instantly shows you the correct size across regions.

Brands use slightly different sizing standards and fits. A 34C in one brand may feel tighter or looser in another. That’s why we recommend measuring regularly and using tools like our Bra Size Calculator before converting.

A UK 32C usually converts to JP C70. In Japan, cup comes first, followed by band (in centimetres). Always double-check using a converter or size chart before purchasing.

The fastest and easiest way is to use our online Bra Size Converter. It compares bra sizes across UK, US, EU, FR, AUS, and JP systems with just a few clicks.

You’ll get the most accurate results by first measuring your band and bust. Use our Bra Size Calculator to find your true size, then convert it using the Bra Size Converter.