Find Your Bra Size
Finding the right bra size isn’t just about comfort — it’s about confidence, support, and feeling your best every day. Our free Bra Size Calculator UK makes it super easy to discover your correct size using just two simple measurements: your bust and band.
Whether you’re shopping online or replacing your favorite bra, this tool ensures you get the fit that’s just right for your body.
📏 How to Use the Bra Size Calculator
To calculate your UK bra size, follow these quick steps:
- Measure Your Band Size
Use a soft tape measure around your ribcage, directly under your bust. Round it to the nearest even number in inches. - Measure Your Bust Size
Wrap the tape around the fullest part of your bust, keeping it level and snug but not tight. - Enter Measurements
Plug those numbers into our online calculator above, hit “Calculate”, and boom — your UK bra size appears instantly!
🧠 How It Works
Our calculator uses the UK bra sizing system, which differs slightly from the US system. Here’s how we determine your size:
- Band size is based on your underbust measurement (rounded to the nearest even number).
- Cup size is calculated by the difference between your bust and band measurements.
| Cup Difference | UK Cup Size |
|---|---|
| <1 inch | AA |
| 1 inch | A |
| 2 inches | B |
| 3 inches | C |
| 4 inches | D |
| 5 inches | DD (E) |
| 6 inches | E (F) |
| 7 inches | F (FF) |
| 8+ inches | G+ |
📌 Example:
If your band size is 32 and your bust is 36, the difference is 4 inches → Your UK bra size = 32D
❓ Why Bra Size Accuracy Matters
Wearing the wrong bra size can lead to:
- Back, shoulder, or neck pain
- Poor posture
- Uncomfortable digging or slipping straps
- Clothes that don’t fit right
A well-fitting bra enhances support, improves posture, and boosts confidence — no matter your size or shape.
👙 UK vs US Bra Sizes – What’s the Difference?
Many women confuse UK and US sizes when shopping online. Here’s the key difference:
- UK brands: use double letters (e.g., DD, FF, GG)
- US brands: usually stop at D or DD and size differently beyond that
Always check the size chart if you’re buying from international stores.
💡 FAQ – Bra Size Calculator UK
🔸 Can I measure my bra size at home?
Yes! All you need is a soft measuring tape, a mirror, and 2 minutes. Make sure to stand upright and breathe normally while measuring.
🔸 What if I’m between sizes?
If your measurement falls between two sizes, try both and go with what feels more comfortable. Consider different styles (e.g., plunge, balconette) for better fit.
🔸 How often should I recheck my size?
Experts recommend checking your bra size every 6–12 months, especially after weight changes, pregnancy, or hormonal shifts.
❤️ Try the Bra Size Calculator Now!
Stop guessing and start feeling fabulous in your fit. Use our easy Bra Size Calculator UK above to get your size in seconds — no store visit needed.
👙 Accurate. Easy. Free.
💬 Share it with your friends — everyone deserves the perfect fit!