Sports Bra Calculator
Estimate a sports-bra starting size and compare support considerations by activity level.
How this sports-bra starting point is calculated
The size estimate uses the same measurement-based band and cup starting method as the main calculator: underbust determines the even-number band reference, while the bust-to-underbust difference determines the cup position.
- Band: the underbust is converted to the calculator's reference units and mapped to the nearest even band.
- Cup: bust minus underbust is rounded to a whole-inch cup index in the US sequence.
- Activity: your selected activity level changes the support-style guidance, not the calculated label.
Sports-bra research shows that breast movement and support needs vary with activity and individual circumstances, so the size label should be checked against the garment's own chart and fit. citeturn0search3turn0search7
Frequently Asked Questions
Answers about sizing methods, measurements, and fit considerations.
What is the difference between compression and encapsulation sports bras?
Compression and encapsulation are different construction approaches, and many sports bras combine elements of both. Do not assign one construction to a cup-size group universally; compare the garment's support design with your activity and personal fit.
Sizing References
- Scurr et al. — breast support and exercise biomechanics (PubMed)