Calculate your British bra size accurately with our responsive calculator. Supports cm and inches, includes size chart, sister sizes, and fit tips for British brands.
Enter Your Measurements
Your Bra Size
Your bra size: 34C (UK) (Example Result)
Conversions: US: 34C, EU: 75C, India: 34C (Example Result)
Sister Sizes
32D, 36B (Example Result)
Recommended Bra Styles
Based on your size, try: Balcony or plunge bras from British brands like Marks & Spencer or Bravissimo for comfort and lift. (Example Result)
British Bra Size Chart
| Difference (cm/inches) | Cup Size |
|---|---|
| 0-2.5 / 0-1 | AA |
| 2.5-5 / 1-2 | A |
| 5-7.5 / 2-3 | B |
| 7.5-10 / 3-4 | C |
| 10-12.5 / 4-5 | D |
| 12.5-15 / 5-6 | DD |
| 15-17.5 / 6-7 | E |
| 17.5-20 / 7-8 | F |
| 20-22.5 / 8-9 | FF |
| 22.5-25 / 9-10 | G |
Bra Size Conversion Table
| UK/India | US | EU |
|---|---|---|
| 28 | 28 | 60 |
| 30 | 30 | 65 |
| 32 | 32 | 70 |
| 34 | 34 | 75 |
| 36 | 36 | 80 |
| 38 | 38 | 85 |
| 40 | 40 | 90 |
| 42 | 42 | 95 |
| 44 | 44 | 100 |
| 46 | 46 | 105 |
| 48 | 48 | 110 |
| 50 | 50 | 115 |
Note: British (UK) cup sizes (DD, E, F, FF, G) differ from US (DD/E, DDD/F, G) beyond D. Band sizes are consistent with US/India but differ from EU.
How to Measure Your Bra Size (British Method)
- Measure your underbust: Wear a non-padded bra. Wrap a soft measuring tape snugly around your ribcage, just under your bust, while exhaling for the tightest measurement.
- Measure your bust: Wrap the tape loosely around the fullest part of your bust, ensuring it’s level and not compressing the breasts.
- Enter measurements above and click “Calculate”.
Tip: Use a mirror or ask a friend to ensure the tape is level. Measuring in cm is preferred for British brands like Marks & Spencer or Bravissimo.
Tips for Accurate Measurements
- Use a soft, flexible measuring tape and check alignment in a mirror.
- Measure underbust while exhaling to ensure a snug fit, as British bands are firmer.
- Keep the tape slightly loose for bust to avoid compression.
- Measure twice, ideally in a non-padded bra, to confirm accuracy.
Common British Bra Fit Issues
- Band too tight? Try a sister size with a larger band (e.g., 34C to 36B). British bands are often firmer.
- Cup gaps or spillage? Adjust cup size (e.g., 34C to 34D for spillage). Cup sizing may vary slightly by brand.
- Straps slipping? Tighten straps or try a balcony or racerback bra from brands like Panache.
- Underwire discomfort? Check band size or opt for a soft-cup bra for comfort.
Privacy Note
Your measurements are not stored or shared. This calculator processes data locally in your browser for maximum privacy.
➤ Related Calculator