Sports Bra Size Calculator for Accurate High Impact Fit Tool

Sports Bra Size Calculator calculates accurate sports bra sizing using ribcage and bust measurements, activity impact level and fit physics to determine band, cup, alpha size and support architecture for high performance comfort and stability driven recommendations for training and athletic use fit

Ribcage (Band)

IN CM

Loose Underbust

Snug Underbust

Tight Underbust

Cup (Bust)

Standing Bust

Leaning Bust

Lying Bust

Primary Activity

SPORT SIZE

—

ALPHA: —

HIGH IMPACT

01 Sizing Verdict

▼

Encapsulation Fit

—

Best for High Impact & Running.

Band Load—

Isolation—

Compression Alpha

—

Best for Yoga, Weights, Low Impact.

Comp Ratio—

Reserve15%

Sister Sport Fit

—

Try if band feels too restrictive.

Supp. Loss15%

ConditionRib Pain

02 Fit Physics

▼

Bounce Reduction

—

Required stability level.

Vert. Ctrl—

Lat. Drift—

Band Grip Index

—

Anchor strength requirement.

Modulus—

Slip Risk—

Cup Containment

—

Coverage required to prevent spill.

Spill Dir—

Depth Class—

03 Activity Match

▼

High Impact (Run)

—

Vertical bounce control.

Fail Mode—

Min StructRacerback

Med Impact (Gym)

—

Cycling, Weights, Elliptical.

Over-Supp—

Efficiency90%

Low Impact (Yoga)

—

Pilates, Barre, Walking.

MobilityMax

Excess Flag—

04 Technical Specs

▼

Support Architecture

—

Construction method.

Load Path—

Separation—

Strap Strategy

—

Back style for stability.

Neck Risk—

Stability—

Breathability Need

—

Sweat management est.

Evap Prio—

Heat Risk—

05 Purchase Intelligence

▼

Brand Mapping

—

Best brands for this fit.

Fidelity—

Fit Bias—

Try-On Probability

—

Likelihood of finding in-store.

In-Store—

Online Only—

Return Risk

—

Fit variance likelihood.

Ret. Cause—

2nd Size—

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