Find your perfect fit with our Sports Bra Size Calculator! Get accurate measurements for maximum support and comfort during workouts. Quick, easy, and free—say goodbye to sizing guesswork!
Enter Your Measurements
Your Sports Bra Size
Standard: 34C, Alpha: M (Example Result)
Conversions: US: 34C, UK/India: 34C, EU: 75C, AU: 12C (Example Result)
Sister Sizes
32D, 36B (Example Result)
Recommended Sports Bra Styles
For medium-impact activities, try a compression or encapsulation sports bra for optimal support and comfort. (Example Result)
Sports Bra Size Chart
| Underbust (cm/in) | Bust Diff (cm/in) | Standard Size | Alpha Size |
|---|---|---|---|
| 63-67 / 25-26 | 2.5-5 / 1-2 | 30A | XS |
| 68-72 / 27-28 | 5-7.5 / 2-3 | 32B | S |
| 73-77 / 29-30 | 7.5-10 / 3-4 | 34C | M |
| 78-82 / 31-32 | 10-12.5 / 4-5 | 36D | L |
| 83-87 / 33-34 | 12.5-15 / 5-6 | 38DD | XL |
| 88-92 / 35-36 | 15-17.5 / 6-7 | 40DDD | XXL |
| 93-97 / 37-38 | 15-17.5 / 6-7 | 42DDD | 3XL |
| 98-102 / 39-40 | 15-17.5 / 6-7 | 44DDD | 4XL |
International Conversion Table
| US | UK/India | EU | Australia |
|---|---|---|---|
| 30 | 30 | 65 | 8 |
| 32 | 32 | 70 | 10 |
| 34 | 34 | 75 | 12 |
| 36 | 36 | 80 | 14 |
| 38 | 38 | 85 | 16 |
| 40 | 40 | 90 | 18 |
| 42 | 42 | 95 | 20 |
| 44 | 44 | 100 | 22 |
| A | A | A | A |
| B | B | B | B |
| C | C | C | C |
| D | D | D | D |
| DD/E | DD | DD | DD |
| DDD/F | E | E | E |
Note: US uses DD/E, DDD/F; UK/India uses DD, E. EU bands are in cm (e.g., 75 = 34). AU uses dress sizes (e.g., 12 = 34).
How to Measure Your Sports Bra Size
- Measure your underbust: Wear a non-padded bra. Wrap a soft measuring tape snugly around your ribcage, just under your bust, while exhaling for a tight fit.
- Measure your bust: Wrap the tape loosely around the fullest part of your bust, ensuring it’s level and not compressing the breasts.
- Select your activity type and enter measurements above, then click “Calculate”.
Tip: Use a mirror to ensure the tape is level. Measure in cm for accuracy.
Tips for Accurate Measurements
- Use a soft, flexible measuring tape and check alignment in a mirror.
- Measure underbust while exhaling for a snug fit, critical for sports bra support.
- Keep the tape slightly loose for bust to avoid compression.
- Measure twice in a non-padded bra to confirm accuracy.
Sports Bra Fit Tips
- Band too tight? Try a sister size with a larger band (e.g., 34C to 36B) or loosen the hook. Ensure two fingers fit under the band.
- Cup gaps or spillage? Adjust cup size (e.g., 34C to 34D for spillage). Ensure full coverage without bulging.
- Straps slipping? Tighten straps or try racerback styles for secure fit during movement.
- Chafing or discomfort? Check band fit or opt for seamless or wirefree sports bras for high-impact activities.
Privacy Note
Your measurements are not stored or shared. This calculator processes data locally in your browser for maximum privacy.
➤ Related Calculator