Bra Size Calculator
The bust size is the loose circumference measured around the chest over the fullest part of the breasts.
The band or frame size is the firm circumference, fitted not tightly, measured directly underneath the breasts.
Explore More Free Tools
Bra Size Converter
Convert bra sizes between different international sizing standards.
Find Your Perfect Fit with Our Accurate Bra Size Calculator
Finding the right bra size is more than just a comfort matter—it’s essential for your health, posture, and overall confidence. Wearing the wrong size can lead to back pain, shoulder strain, and a poor fit that affects how your clothes look and feel. That’s why we’ve created this bra size calculator to help women across the UK determine their correct bra size in just a few simple steps.
Our bra size calculator UK tool is tailored specifically for UK sizing standards, ensuring your results are accurate, relevant, and easy to use. Whether you’re buying a bra online or simply reassessing your size, our easy-to-use calculator ensures you’re wearing a size that supports and flatters your body.
Why You Need a Bra Size Calculator
Most women are wearing the wrong bra size without even realising it. A recent survey found that nearly 80% of women in the UK are not wearing the correct bra.
This is often because traditional sizing methods are vague or outdated. Our bra size calculator removes the guesswork and provides accurate results based on your real measurements.
Common signs that you might be wearing the wrong bra size include:
The band rides up your back
Straps dig into your shoulders
Cups overflow or gape
Frequent adjusting or discomfort
Using a reliable bra size calculator UK is the first step to eliminating these issues and discovering your ideal fit.
How to Use Our Bra Size Calculator
Our tool is designed for simplicity. To use the bra size calculator, all you need are two measurements:
Underbust measurement: Measure directly under your bust where the band sits.
Bust measurement: Measure around the fullest part of your bust.
The calculator will then provide your band size and cup size using the UK sizing chart. This makes it an accurate bra cup size calculator suitable for all women in the UK.
Understanding Your Results
Once you input your measurements, our bra size calculator will give you your recommended bra size. For example, if your underbust is 32 inches and your bust is 37 inches, the calculator might recommend a 32DD, depending on your exact measurements.
Our bra size calculator UK is designed to follow the British sizing system, which is different from European or US sizing. So it’s especially useful if you’re shopping in the UK and want to avoid confusion when buying from local retailers.
Tips on Measuring Yourself Correctly
To get the most accurate results from our bra size calculator, follow these tips:
Use a soft measuring tape for accuracy
Stand straight but relaxed while measuring
Measure without a padded bra or wear a lightly lined one
Round your measurements to the nearest whole number
By taking careful and precise measurements, our bra size calculator UK will be able to give you the most accurate result.
How to Calculate Bra Size Manually
If you’re curious about how to calculate bra size manually, here’s how it works:
Measure your underbust – this is your band size. Round it to the nearest even number.
Measure your bust at its fullest point.
Subtract your underbust measurement from your bust measurement.
The difference between these two determines your cup size.
For example:
Underbust: 34″
Bust: 39″
Difference: 5″
According to the UK system, a 5-inch difference equals a DD cup. So your bra size would be 34DD.
Our bra cup size calculator automates this process for you, ensuring less room for error and faster results.
Benefits of Using a Bra Size Calculator
Using our bra size calculator provides several benefits:
Comfort: A well-fitted bra ensures you’re supported without discomfort
Confidence: Clothes look and feel better
Health: Reduces risks of back, neck, and shoulder pain
Savings: Fewer returns and better investment in lingerie
Thousands of women across the country are already using our bra size calculator UK to find their perfect fit.
The Importance of Rechecking Your Size
Your body changes over time—weight fluctuations, pregnancy, hormonal changes, and age can all affect your breast size. That’s why we recommend using the bra size calculator every 6-12 months, or whenever you notice a change in how your bra fits.
Understanding how to calculate bra size consistently can help you stay ahead of these changes and maintain your comfort.
FAQs About Bra Sizing
Q1: Can I use this bra size calculator if I’m pregnant or breastfeeding?
Yes, our bra size calculator UK is suitable for expectant and nursing mothers. Just ensure you take your current measurements for the most comfortable and supportive fit.
Q2: What if I fall between two cup sizes?
Breast shape and personal preference matter. If you’re in between, you may want to try both sizes. Our bra cup size calculator gives the closest match, but slight adjustments may help.
Q3: Is the bra size calculator suitable for plus-size women?
Absolutely. Our bra size calculator is designed to cater to all body shapes and sizes.
Q4: How often should I remeasure my bra size?
We recommend using the bra size calculator UK every 6 to 12 months, or any time your body changes.
Tips for Shopping Online After Using the Calculator
Now that you’ve used the bra size calculator, here are a few tips for buying bras online:
Check the store’s return policy
Read reviews on sizing accuracy
Compare brand sizing charts
Try different styles (balconette, plunge, full cup) for fit
With the help of our bra size calculator UK, you’ll be able to shop confidently and make informed choices.
Our bra size calculator is more than a tool—it’s your first step towards better comfort, health, and confidence. By understanding how to calculate bra size, you empower yourself to make smarter choices that enhance your everyday life.
Whether you need a new everyday bra, maternity support, or a stylish piece for a special occasion, starting with an accurate size using our bra size calculator UK is key.
Stop guessing. Start measuring. Find your perfect fit today with our easy and accurate bra cup size calculator.
Disclaimer: All tools and calculators provided on New Rivag are intended for informational purposes only. While we strive for accuracy and relevance, we do not guarantee results or assume responsibility for any consequences arising from the use of these tools. Always consult a professional for personalised advice or fitting.