Bra Size Calculator

Find Your Perfect Bra Size

Calculate your correct bra size based on bust and band measurements. Our bra size calculator helps you find the perfect fit using international sizing standards, improving comfort and support.

The Complete Guide to Measuring Bra Size

Why Proper Bra Sizing Matters

Finding the right bra size is crucial for comfort, support, and overall well-being. A well-fitting bra can improve posture, reduce back pain, and boost confidence. Unfortunately, studies suggest that up to 80% of women wear the wrong bra size, often due to a lack of knowledge about proper sizing techniques or changes in body shape over time.

Wearing an ill-fitting bra can lead to a range of issues, including discomfort, poor posture, and even long-term health problems. Too tight, and you might experience breathing difficulties or skin irritation. Too loose, and you'll lack the necessary support, potentially leading to back and shoulder pain.

Step-by-Step Guide to Measuring Your Bra Size

  1. Wear the right bra: Start with an unpadded bra or no bra at all for the most accurate measurements.
  2. Measure your band size:
    • Wrap a measuring tape snugly around your ribcage, just under your breasts.
    • Make sure the tape is parallel to the ground and breathe normally.
    • Round to the nearest whole number. If it's an odd number, round up to the next even number.
  3. Measure your bust size:
    • Wrap the measuring tape around the fullest part of your bust.
    • Don't pull the tape too tight; it should be just tight enough to stay in place.
    • Round to the nearest whole number.
  4. Calculate your cup size: Subtract your band size from your bust measurement. The difference determines your cup size according to the following chart:

Cup Size Chart

Difference (inches)Cup Size
Less than 1AA
1A
2B
3C
4D
5DD/E
6DDD/F

Understanding Different Sizing Systems

Bra sizing can vary significantly between countries, which can be confusing when shopping internationally or comparing sizes. Here's a quick overview of how sizing differs in our four main countries:

  • USA and UK: These countries use the same band sizing system, but cup sizes can differ slightly for larger sizes.
  • Australia: Band sizes are typically 6 inches larger than US/UK sizes. For example, a US/UK 32 band would be a 38 in Australia.
  • India: Band sizes are often listed in centimeters and may be up to 20 cm larger than US/UK sizes.

International Band Size Conversion Chart

US/UKAustraliaIndia (cm)
303665-70
323870-75
344075-80
364280-85
384485-90

Tips for Finding the Perfect Fit

  • Always try on a bra before purchasing, if possible. Sizes can vary between brands and styles.
  • The band should be snug but not tight. You should be able to fit two fingers under the band comfortably.
  • The center gore (the part between the cups) should lie flat against your sternum.
  • Cups should fully contain your breast tissue without any spillage or gaping.
  • Straps should stay in place without digging into your shoulders.
  • When you raise your arms, the bra should stay in place without riding up.
  • Remember that your bra size can change due to factors like weight fluctuations, pregnancy, or menopause.

Common Bra Fitting Issues and Solutions

  • Straps digging in or slipping off: This often indicates a band that's too loose. Try a smaller band size or adjust the straps. Remember, straps should provide only 10% of the support.
  • Band riding up in the back: The band is likely too big. Go down a band size and up a cup size to maintain the same volume.
  • Cups gaping or wrinkling: The cups are too large. Try going down a cup size or choosing a different style that better suits your breast shape.
  • Breast tissue spilling out of cups: The cups are too small. Go up a cup size while keeping the same band size.
  • Underwire poking or not sitting flat: This could indicate a cup that's too small or a style that doesn't match your breast shape. Try a larger cup size or a different style.
  • Center gore not lying flat: This often means the cups are too small. Try going up a cup size.

The Importance of Regular Fittings

Your bra size isn't static; it can change throughout your life due to various factors. It's recommended to get fitted or remeasure yourself every 6-12 months, or if you experience any of the following:

  • Significant weight gain or loss
  • Pregnancy or breastfeeding
  • Hormonal changes, including menopause
  • Starting or changing a fitness routine
  • Changes in medication that might affect your body

Regular fittings ensure that you're always wearing the most comfortable and supportive bra for your current body shape, promoting better breast health and overall comfort.

Caring for Your Bras

Proper care can extend the life of your bras, ensuring they maintain their shape and support for longer. Here are some tips:

  • Hand wash your bras or use a lingerie bag if machine washing.
  • Use cold water and a gentle detergent to prevent fabric degradation.
  • Never put bras in the dryer; always air dry them.
  • Store bras with the cups facing outward to maintain their shape.
  • Rotate your bras to give the elastic time to recover between wears.
  • Replace your bras every 6-12 months, depending on wear and care.

Conclusion

Finding the right bra size is a journey, not a destination. Your body changes over time, and so will your bra needs. By understanding how to measure yourself, recognizing the signs of a good fit, and knowing how to care for your bras, you're well on your way to achieving optimal comfort and support.

Remember, while our calculator provides a great starting point, it's always beneficial to try on bras and get professional fittings when possible. Every brand and style fits differently, so don't be discouraged if you need to try a few sizes to find your perfect fit.

Embrace your unique shape and size, and celebrate the diversity of bodies. A well-fitting bra isn't just about looks; it's about feeling comfortable, confident, and supported in your everyday life.

How to Measure

Band size: Measure snugly around your ribcage just under your bust, keeping the tape parallel to the ground. Round to nearest whole number. Cup size: Measure around the fullest part of your bust. The difference between bust and band measurements determines cup size (1 inch = A cup, 2 inches = B cup, etc.).

Understanding Bra Sizes

Bra size consists of band size (number) and cup size (letter). Sister sizes have the same cup volume but different band sizes (e.g., 34C = 32D = 36B). If band is too tight, go up in band and down in cup. If cups overflow, increase cup size while keeping band the same.

Common Fit Issues

Signs of poor fit: band riding up back, cups gaping or overflowing, straps digging in or falling off, center gore not laying flat, underwire poking. About 80% of women wear the wrong bra size. Professional fittings recommended annually as body changes with weight, pregnancy, and age.