Bra Size Calculator
Find your perfect fit – US, UK & EU sizing
Your Bra Size
Size Conversion
How to measure
- Underbust: Measure snugly around your ribcage, just below your bust.
- Overbust: Measure loosely around the fullest part of your bust.
- Band size is the underbust measurement rounded to nearest even number.
- Cup size = difference between overbust and underbust (1 inch = 1 cup size).
All calculations are instant and local – no data leaves your device.
Fitting Guide
📏 How to Measure Correctly
- Use a soft measuring tape, not metal.
- Measure underbust snugly (exhale normally).
- Measure overbust loosely across the fullest part.
- Take measurements while wearing a non-padded bra.
💡 Signs of a Poor Fit
- Band rides up in back → too loose.
- Breasts spilling over cups → cup too small.
- Gaping at top of cups → cup too large.
- Straps digging in → need adjustment or different style.
📊 Cup Size Difference Chart (Inches)
| Diff (in) | US/UK Cup | EU Cup |
|---|---|---|
| <1 | AA | AA |
| 1 | A | A |
| 2 | B | B |
| 3 | C | C |
| 4 | D | D |
| 5 | DD/E | E |
| 6 | DDD/F | F |
| 7 | G | G |
| 8 | H | H |
| 9 | I | I |
| 10 | J | J |
🌍 Band Size Equivalents
| US/UK | EU (cm) | FR/ES |
|---|---|---|
| 28 | 60 | 75 |
| 30 | 65 | 80 |
| 32 | 70 | 85 |
| 34 | 75 | 90 |
| 36 | 80 | 95 |
| 38 | 85 | 100 |
| 40 | 90 | 105 |
| 42 | 95 | 110 |
About Bra Size Calculator
The Bra Size Calculator is a free online tool that helps women find their correct bra size quickly and accurately. By entering simple body measurements such as bust size and underbust size, the calculator estimates the appropriate band size and cup size for a comfortable and supportive fit.
Wearing the correct bra size is important for comfort, posture, confidence, and breast support. Whether you’re shopping online, purchasing a new bra, or checking your current size, our Bra Size Calculator provides instant results to help you make informed choices. The tool supports various measurement units and is easy to use on mobile phones, tablets, and desktop devices.
Why Is the Bra Size Calculator Important?
The Bra Size Calculator is important because many women unknowingly wear the wrong bra size, which can lead to discomfort, poor support, shoulder pain, back pain, and fitting issues. Knowing your correct bra size helps ensure better comfort and confidence throughout the day.
Benefits of using a Bra Size Calculator include:
• Find your correct bra size instantly.
• Improve comfort and breast support.
• Reduce fitting and sizing errors when shopping.
• Enhance posture and overall confidence.
• Save time when buying bras online or in stores.
• Support better clothing fit and appearance.
• Easy and convenient measurement-based calculation.
Whether you are buying your first bra, updating your wardrobe, or checking your current size, the Bra Size Calculator offers a simple way to find the right fit.
Frequently Asked Questions (FAQ)
What is a Bra Size Calculator?
A Bra Size Calculator is an online tool that estimates your bra size using your bust and underbust measurements.
How do I use the Bra Size Calculator?
Measure around your bust and underbust area, enter the measurements into the calculator, and it will determine your estimated band size and cup size.
Why is finding the correct bra size important?
A properly fitted bra improves comfort, support, posture, appearance, and overall confidence while reducing discomfort caused by an incorrect fit.
Can bra size change over time?
Yes. Factors such as age, weight changes, pregnancy, breastfeeding, hormonal changes, and fitness routines can affect bra size.
Is this Bra Size Calculator free?
Yes, the calculator is completely free and available online anytime.
Can I use this calculator on my phone?
Yes, it works on smartphones, tablets, laptops, and desktop computers.
How accurate is the calculator?
The calculator provides a reliable estimate based on the measurements entered. For the best fit, professional fitting may also be helpful.
Does the calculator support different measurement units?
Many Bra Size Calculators support both inches and centimeters for convenience.