Find Your Perfect Bra Size

Simple, accurate, and free. Calculate your ideal bra size in minutes.

Why Accurate Bra Sizing Matters for Australian Women

Finding the right bra size is more than just a matter of comfort—it's essential for your health, posture, and overall well-being. Research consistently shows that approximately 80% of women are wearing the wrong bra size, often without realising the impact on their daily lives. An ill-fitting bra can cause shoulder pain, back discomfort, skin irritation, and even breathing difficulties.

Our Australian Bra Size Calculator is specifically designed to address the unique sizing standards used across Australia and New Zealand. Unlike generic calculators that may use US or UK measurements, our tool accounts for the Australian band numbering system (8, 10, 12, 14, etc.) and provides accurate conversions for international shopping. Whether you're buying from local boutiques, major Australian retailers like Berlei, Bonds, or Triumph, or shopping online from overseas stores, knowing your precise size saves time, money, and the frustration of returns. Simply enter your measurements below and discover your perfect fit in seconds.

Bra Size Calculator

Measure around your ribcage, directly under your breasts

Measure around the fullest part of your bust

User Guide & Frequently Asked Questions

Getting an accurate bra size measurement at home is straightforward when you follow the right technique. Start by wearing a non-padded bra or no bra at all, and use a soft measuring tape. Stand in front of a mirror to ensure the tape remains parallel to the floor throughout. Measure your underbust snugly around your ribcage, directly beneath your breasts. Then measure your bust at the fullest point, typically across the nipples. Enter both measurements into our calculator for instant results.

Why does my bra size differ between brands?

Bra sizing can vary between manufacturers due to differences in pattern-making, materials, and fit preferences. Australian brands like Berlei may fit slightly differently from international brands like Victoria's Secret or Triumph. The size from our calculator serves as your starting point—always try bras on when possible, and consider trying your sister sizes if the primary size doesn't feel perfect. A well-fitting bra should have a band that stays horizontal, straps that don't dig in, and cups that fully contain your breast tissue without gaping.

How often should I recalculate my bra size?

Your bra size can change due to weight fluctuations, hormonal changes, pregnancy, breastfeeding, menopause, and even changes in exercise routines. We recommend recalculating your bra size every 6 to 12 months, or whenever your current bras feel uncomfortable. Many women notice size changes of one or more cup sizes throughout their lifetime, so regular measurement ensures ongoing comfort and support.

What if my measurements fall between two sizes?

If your measurements place you between sizes, consider your personal preference for fit. If you prefer more support and a snugger feel, round down to the smaller band size and potentially size up in the cup. If you prefer a looser, more relaxed fit, round up in the band. Sister sizes are particularly helpful here—for example, if you're between 12D and 14C, try both to see which feels more comfortable for your body shape and lifestyle.

How to Measure

1

Underbust Measurement

Stand straight and breathe normally. Measure around your ribcage, directly under your breasts. Make sure the tape is parallel to the floor and snug but not tight.

2

Bust Measurement

Measure around the fullest part of your bust, typically across the nipples. Keep the measuring tape parallel to the floor and don't pull it too tight or too loose.

3

Tips for Accuracy

Wear an unpadded bra or no bra, measure in the morning when your breasts are their natural size, and take the measurement three times to ensure accuracy.

Understanding Bra Sizes

Band Size

The band size is the number in your bra size (e.g., 10, 12, 14). It's based on your underbust measurement. For Australian sizes, a 10 typically corresponds to a 68-72cm underbust, while a 16 corresponds to 88-92cm.

Cup Size

Cup sizes (AA, A, B, C, D, DD, E, F, FF, G, GG, H, HH, etc.) represent the difference between your bust and band measurements. Each cup size represents approximately 2cm or 1 inch difference.

Finding the Perfect Fit

A properly fitted bra should have a band that sits horizontally across your back without riding up, straps that don't slip, and cups that contain all your breast tissue without bulging or gaping.

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Everything You Need to Know About Bra Size Calculator for Australian Women

Finding the perfect fitting bra is essential for comfort, support, and confidence. Studies show that over 80% of women wear the wrong bra size, which can lead to discomfort, poor posture, and even health issues. Our bra size calculator is specifically designed for Australian women, using accurate measurement techniques and Australian sizing standards.

A bra size calculator is a valuable tool that takes the guesswork out of finding your ideal bra size. Whether you've lost weight, gained weight, or simply haven't been measured in a while, using a reliable bra size calculator can help you discover your correct measurements. This is particularly important as our bodies change throughout our lives due to hormonal fluctuations, pregnancy, weight changes, and aging.

One of the most common bra sizing mistakes is wearing a band size that's too large. Many women compensate for a cup size that's too small by increasing their band size, resulting in inadequate support. Our calculator helps you determine both your precise band and cup measurements, taking into account the unique Australian sizing system used by major Australian retailers.

Australian bra sizes differ from international standards. While UK and US sizes have slight variations, the Australian system uses a specific numbering convention for band sizes combined with standard cup size letters. Understanding these differences is crucial for Australian women shopping for lingerie, whether online or in-store. Our bra size calculator automatically handles all these conversions, showing you equivalent sizes in AU, UK, US, and EU systems.

Using a bra size calculator offers several benefits beyond just finding your measurements. It promotes breast health by ensuring proper support, reduces back and shoulder pain by distributing weight correctly, and enhances your appearance under clothing by improving posture and silhouette. Additionally, knowing your accurate bra size can save you time and money by reducing returns and exchanges.

For the best results with any bra size calculator, it's important to measure yourself at home when you're relaxed and comfortable. Follow our step-by-step measuring guide, use a soft measuring tape, and take measurements while standing straight with your arms at your sides. Remember that bra sizes can vary slightly between different brands and styles, so the calculated size serves as your starting point for finding the perfect fit.

Whether you're shopping for everyday bras, sports bras, or special occasion lingerie, starting with accurate measurements from a reliable bra size calculator is the foundation of a comfortable bra wardrobe. Our free calculator is designed to provide Australian women with the confidence to shop for lingerie that fits perfectly and supports them throughout their day.