Measure Bra Size Accurately at Home
Use this bra size calculator to determine your correct bra size based on your bust and band measurements. For best results, use a soft measuring tape and measure to the nearest ¼ inch or ½ centimeter. The tool supports international size systems used in the US, UK, EU, France, Spain, Belgium, Australia, and New Zealand.
Bra Size Calculator
Find your perfect bra fit with our accurate measurement tool
Measure Your Size
Your Perfect Bra Size
This is your recommended size based on measurements
Sister Sizes:
How to Measure
Band Measurement
Using a soft measuring tape, measure snugly around your ribcage directly under your bust. Ensure the tape is parallel to the floor.
Bust Measurement
Measure loosely around the fullest part of your bust. Keep the tape parallel to the floor and don’t compress your breasts.
Calculate
Enter your measurements and let our calculator determine your perfect bra size. Remember to measure without a bra for accuracy.
Signs of a Well-Fitting Bra
- The band is snug and parallel to the floor
- The center gore lies flat against your sternum
- Breasts are fully contained within the cups
- Straps don’t dig into your shoulders
- You can comfortably fit two fingers under the band
Understanding Bra Sizes
A bra size consists of two components: the band size (number) and the cup size (letter). The band size represents the measurement around your ribcage, while the cup size indicates the difference between your bust and band measurements.
Why Proper Fit Matters
Wearing the correct bra size is essential for comfort, support, and breast health. An ill-fitting bra can cause:
- Back, neck, and shoulder pain
- Poor posture
- Skin irritation and chafing
- Breast tissue damage
- Reduced confidence
Bra Size Conversion Chart
| Band Size (cm) | US Size | UK Size | EU Size |
|---|---|---|---|
| 60-65 | 28 | 28 | 60 |
| 65-70 | 30 | 30 | 65 |
| 70-75 | 32 | 32 | 70 |
| 75-80 | 34 | 34 | 75 |
| 80-85 | 36 | 36 | 80 |
When to Remeasure
Your bra size can change over time due to various factors. We recommend remeasuring:
- Every 6-12 months
- After significant weight changes (±5kg/10lbs)
- During and after pregnancy
- After breast surgery
- When experiencing discomfort in your current bras
How to Use the Bra Size Calculator
Enter your measurements and click “Calculate” to see your accurate bra size:
- Bust Size: 95 cm
(Measure around the fullest part of your chest while standing straight, wearing a well-fitting bra.) - Band Size: 85 cm
(Measure snugly around your ribcage, just under the bust.)
Tip: Make sure the measuring tape is level and not too tight or too loose.
What Is Bra Size? Understanding Bust vs. Band
- Bust Size: The circumference around the fullest part of the breasts.
- Band Size: The measurement directly under the bust. This forms the base of the bra and supports most of the weight.
Bra size = Band measurement + Cup size
The cup is calculated as the difference between bust and band measurements.
Bra Size Converter – Convert Between US, UK, EU & More
Bra sizes vary by region. Use the chart below to find your equivalent bra size across different countries:
| Region | Band Size | Cup Size |
|---|---|---|
| US/Canada | 28 inches | AA |
| UK | 60 cm | A |
| EU | 65 cm | A |
| France/Spain | 80 cm | A |
| Australia/NZ | 8 | A |
Always refer to the brand’s size guide when shopping across countries, as sizing may differ slightly.
Wearing the Wrong Bra Size? You’re Not Alone
Studies suggest that 70–85% of women wear the wrong bra size. While the exact numbers may vary, it’s clear that many women struggle to find the right fit due to:
- Lack of standard sizing across brands and countries
- Choosing too large a band size and too small a cup
- Unawareness of how to measure properly
A 34B in one brand may fit completely differently from a 34B in another.
Common Signs of a Poorly Fitted Bra
- Band rides up your back or digs into your skin
- Shoulder straps leave marks or cause neck pain
- Cups overflow or gap around the breast
- Center panel doesn’t lie flat against your chest
If you’re experiencing any of these issues, it’s time to recheck your measurements.
Bra Fitting Guide: Key Sizing Components
1. Band Size (Frame Size)
The band supports 80–90% of your bust weight. It should feel snug and level all around your body without digging in.
Band sizes differ by region (e.g., Small, Medium, Large vs. numbered sizes). Always check conversion charts for accuracy.
2. Cup Size
Cup size reflects the difference between bust and band measurements. The larger the difference, the larger the cup.
Final Tips for the Best Fit
- Recheck your size every 6–12 months, especially after weight changes, pregnancy, or hormonal shifts.
- Try different styles – not all bras are made for all body types.
- Use a size chart when shopping online, especially for international brands.
- Comfort is key – if it doesn’t feel right, it probably isn’t.
FAQs
Q: How do I know if I’m wearing the right bra size?
A: The band should stay in place, straps shouldn’t dig, and the cups should fully contain your breasts without gaps or bulges.
Q: Can my bra size change over time?
A: Yes. Hormonal changes, aging, weight gain/loss, or pregnancy can all affect your bra size.
