Free bra size calculator for band and cup estimates, sister sizes, and international labels.
About Bra Size Calculator
Bra Size Calculator turns underbust and bust measurements into a starting band and cup size. Supports quick or six-measurement modes, sister sizes, US/UK/EU/FR/AU labels, and an optional try-on journal. Measurements stay on device. A size to try, not a fit guarantee.
✓ VerifiedNov 4, 2026
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