Bra Size Converter – Convert US, UK, EU & International Sizes

Bra Size Converter

The Bra Size Converter is a free online tool that helps you find and convert your bra size across different international sizing systems. Enter your underbust and bust measurements to calculate an estimated bra size and see equivalent sizes for US, UK, EU, French (FR), and Australian (AU) sizing systems.Whether you are shopping for lingerie from another country, comparing international bra sizes, or trying to understand different cup and band measurements, this international bra size converter provides a quick and convenient reference.

What Is a Bra Size Converter?

A bra size converter helps you understand how the same bra size is represented in different countries and sizing standards. Bra sizes generally consist of two parts: a band size, which represents the measurement around your ribcage, and a cup size, which represents the difference between your bust and band measurements.Because sizing systems can vary between countries and brands, a size such as 34C in the US or UK may be represented differently in another sizing system. A bra size conversion tool makes these differences easier to understand.Our converter can help you:

• Convert bra sizes between common international sizing systems.
• Compare US, UK, EU, FR, and AU bra sizes.
• Calculate an estimated bra size from your measurements.
• Find related sister sizes with similar cup volume.
• Understand differences between band sizes and cup sizes.
• Make international lingerie shopping easier.
• Use your measurements as a starting point when comparing different brands.

International Bra Size Converter

Bra sizing is not completely standardized worldwide. The US and UK sizing systems use band numbers and letter-based cup sizes, while many European systems use centimeter-based band measurements.For example, a US or UK band size may be displayed as 34, while an equivalent European size may be displayed around 75, depending on the sizing system and manufacturer.The converter provides estimated equivalents across several common systems, including:

• US bra size
• UK bra size
• EU bra size
• French (FR) bra size
• Australian (AU) bra size

Always check the individual brand\\\\\\\'s size chart when purchasing lingerie because sizing conventions and fit can vary between manufacturers.

How to Use the Bra Size Calculator

Using this bra size calculator is simple:

1. Measure your underbust around your ribcage, directly underneath your breasts.
2. Measure your bust around the fullest part of your chest.
3. Enter both measurements in inches.
4. Select Calculate Bra Size & Sister Sizes.
5. Review your estimated US/UK size, EU size, and sister size options.
6. Use the results as a reference when comparing international bra sizes.

For the most useful result, take your measurements while wearing a lightly lined or unpadded bra, or measure without a bra if appropriate. Keep the measuring tape level around your body and avoid pulling it too tightly.

Understanding Band Size and Cup Size

A bra size consists of a band size and a cup size.The band size relates to the measurement around your ribcage underneath your breasts. The band should feel secure without being painfully tight and should remain relatively level around your back.The cup size is determined from the relationship between the bust measurement and the band measurement. As the difference increases, the cup letter generally increases.For example, a size such as 34C contains:

• 34 = band size
• C = cup size

Remember that cup letters are not absolute measurements. A cup size changes in volume depending on the band size, which is why sister sizes are useful.

Bra Sister Sizes

A sister size is a bra size with a different band measurement but a similar cup volume. Sister sizing can be helpful when your current band feels too tight or too loose.For example, moving down one band size generally requires moving up one cup size to maintain a similar cup volume. Moving up one band size generally requires moving down one cup size.The calculator displays tighter- and looser-band sister size alternatives to help you compare possible fits.Sister sizes are useful when:

• The band feels too tight.
• The band rides up your back.
• The band feels too loose.
• You need an alternative size from a particular brand.
• Your preferred size is temporarily unavailable.

US, UK, EU, FR and AU Bra Size Conversion

Different countries use different conventions for bra sizing. The most common systems supported by this tool include US, UK, European, French, and Australian sizing.

US and UK Bra Sizes

US and UK bra sizes use numerical band sizes followed by cup letters. Some cup progressions differ, particularly for larger cup sizes, so US and UK sizes should not always be assumed to be identical.

European Bra Sizes

European sizing commonly uses centimeter-based band numbers such as 70, 75, 80, and 85. The cup letter is then added to the band number.

French Bra Sizes

French sizing generally uses a larger numerical band value than the equivalent European measurement. The converter provides an estimated French equivalent for reference.

Australian Bra Sizes

Australian sizing uses its own band-size conventions and can differ from both US/UK and European systems. Always compare the converted result with the retailer\\\\\\\'s own size chart before buying.

How to Measure Your Bra Size

Accurate measurements are important when using a bra size calculator.

Measure Your Underbust

Wrap a flexible measuring tape around your ribcage directly underneath your breasts. Keep the tape horizontal and comfortably snug. Record the measurement in inches or centimeters.

Measure Your Bust

Measure around the fullest part of your bust while keeping the tape level across your back. Do not pull the tape excessively tight.

Compare Your Measurements

The difference between your bust and band measurements helps estimate the cup size, while your underbust measurement is used to estimate the band size.Because body shape, breast shape, bra construction, fabric, and brand sizing can affect fit, the calculated result should be treated as a starting point rather than a guarantee.

Common Uses for a Bra Size Converter

A bra size conversion tool can be useful in many situations:

• International shopping: Find an approximate equivalent when a retailer uses another country\\\\\\\'s sizing system.
• Online lingerie shopping: Compare your usual size with the size shown by an international brand.
• Moving or traveling abroad: Understand local bra size conventions.
• Comparing brands: Check how a size may translate between sizing systems.
• Finding sister sizes: Explore alternative band and cup combinations.
• Understanding bra sizing: Learn how band measurements and cup letters work.

Why Use the Bra Size Converter on Toolszzz?

The Toolszzz Bra Size Converter provides a simple way to calculate and compare bra sizes without manually working through different sizing systems.Toolszzz is a collection of 1000+ free online utility tools, including calculators, converters, PDF tools, developer tools, and other useful online utilities. You can use the bra size calculator alongside other tools without installing additional software or creating complicated calculations yourself.The converter is designed to provide quick results that can serve as a convenient reference when researching bra sizes online.

Important Bra Fitting Tips

A calculated bra size does not always guarantee the perfect fit. Different brands and styles can use different measurements, materials, and cup shapes.When checking a bra\\\\\\\'s fit, consider these points:

• The band should stay level around your back rather than riding upward.
• The band should feel supportive without causing significant discomfort.
• The cups should contain the breast tissue without excessive spilling or gaping.
• The center gore should sit appropriately against the chest when the bra design allows it.
• Straps should provide support without digging excessively into the shoulders.
• Always check the retailer\\\\\\\'s bra size chart before purchasing.

For international purchases, use the converted size as a reference and compare it with the manufacturer\\\\\\\'s specific sizing guide.

Frequently Asked Questions

What is a bra size converter?

A bra size converter is an online tool that helps compare bra sizes between different sizing systems, such as US, UK, EU, FR, and AU. It can make international lingerie shopping easier by showing approximate equivalent sizes.

What is an international bra size converter?

An international bra size converter converts or compares bra sizes used in different countries and regions. It helps users understand how a familiar size may be represented in another sizing system.

Are US and UK bra sizes the same?

US and UK bra sizes can be similar for some sizes, but their cup-size progression is not identical across the entire range. For this reason, it is better to use a conversion chart or calculator rather than assuming the sizes are always the same.

What is a 34C in EU bra size?

A US/UK 34C is commonly represented around 75C in European sizing, although exact conversions can vary by brand and sizing convention. Always check the manufacturer\\\\\\\'s size chart before purchasing.

How do I convert UK bra size to US bra size?

Enter your measurements into the calculator and compare the resulting size with the relevant US and UK sizing systems. Because cup progressions can differ, especially at larger sizes, brand-specific charts should be used for final confirmation.

How do I find my bra size?

Measure your underbust and bust with a flexible measuring tape, then enter both measurements into the bra size calculator. The tool estimates your band and cup size and provides international equivalents.

What are sister sizes?

Sister sizes are bra sizes with different band measurements but similar cup volume. They can be useful when your normal band size is too tight or too loose and you need an alternative size.

Can I use a bra size converter for online shopping?

Yes. A bra size converter can help you compare your usual size with an international retailer\\\\\\\'s sizing system. However, because fit varies between brands and styles, always review the retailer\\\\\\\'s own size chart before ordering.

Is a bra size calculator 100% accurate?

No calculator can guarantee a perfect bra fit for every brand and body shape. The result is an estimate based on your measurements and the selected sizing system. Trying on the bra and checking the manufacturer\\\\\\\'s size guide is recommended whenever possible.