Calculate your sports bra size with our calculator, designed for comfort and support during low, medium, and high-impact activities. Supports cm and inches, includes size chart, style recommendations, and fit tips.
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.
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