Sports Bra Size Calculator
Get the right sports bra size based on your measurements and activity level. A properly fitted sports bra reduces bounce by up to 78% and prevents long-term breast tissue damage.
Your Measurements
Sports Bra Fitting Guide
Why Sports Bra Sizing Matters
Regular bras are not designed to handle the multi-directional movement during exercise. Without proper support, breasts can move up to 21cm during high-impact activities.
A properly fitted sports bra reduces this movement by up to 78%, preventing discomfort, pain, and long-term stretching of Cooper's ligaments.
Types of Sports Bras
Compression
Best for A-C cups and low-impact activities. Compresses breasts against the chest wall.
Encapsulation
Best for D+ cups and high-impact activities. Supports each breast separately in molded cups.
Combination
Offers both compression and encapsulation. Ideal for high-impact activities across all cup sizes.
Sports Bra FAQ
Should I wear a different size sports bra than my regular bra?
Often yes - sports bras should fit snugger, especially the band. Many women size down one band size and up one cup size from their everyday bra.
How do I know if my sports bra fits correctly?
The band should be firm and level around your body. You should be able to fit two fingers under the straps. Do a jump test - minimal bounce means good fit.
How often should I replace my sports bra?
Every 6-12 months with regular use, or after approximately 72 washes. The elastic and support materials degrade over time even if the bra looks fine.
Related Tools
Our content is researched, written, and regularly updated by our editorial team using the A Bra That Fits (ABTF) methodology — the same approach validated by the 500,000+ member r/ABraThatFits community. We cite peer-reviewed research, lingerie industry standards, and community data. Our calculators process data locally in your browser; we do not collect body measurements.
We use the modern 6-measurement ABTF method rather than the outdated +4 inch rule. This approach has been independently validated by the r/ABraThatFits community to produce more accurate and comfortable bra sizes than traditional two-measurement methods.