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Find Your Correct Bra Size

Calculate your bra size from band and bust measurements. Includes sister sizes and fitting tips.

📅 Updated April 2026 Formula verified 📖 4 min read 🆓 Free · No sign-up

Measure

Underbust = band (28,30,32...)। Fullest bust - underbust = cup (1"=A, 2"=B, 3"=C, 4"=D)। 80% women wear wrong size। Signs: band rides up, cups wrinkle/overflow, straps dig। Zivame, Clovia: online fitting guides + wide range।

Indian Brands

Zivame, Clovia: best Indian online (size guide + easy returns)। Jockey: reliable。Triumph: premium। In-store fitting at Marks & Spencer, Triumph for accuracy।

⚡ CalcWolf Insight

An estimated 80% of women wear an incorrect bra size. The most common error: wearing a band that is too loose and a cup that is too small. A properly fitted bra should get most of its support from the band (80%), not the straps (20%). If your straps are doing the heavy lifting and digging into your shoulders, your band is too big.

Frequently asked questions
How measure?
Underbust (band) + bust difference (cup)। 2"=B, 3"=C, 4"=D।
Best Indian brand?
Zivame, Clovia: wide range, good returns policy। Jockey: basics। Triumph: premium।
✓ Math logic verified against primary sources → See our verification process
Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
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Found a bug or outdated data? Reports go directly to Kevin and are reviewed personally.