πŸ‘™
Fashion

Bra Size Calculator

Calculate your bra size from your bust and underbust measurements (UK sizing).

βœ“ Freeβœ“ Instant resultsβœ“ Mobile friendlyβœ“ No sign-up
Google AdSense β€” 728Γ—90
UK Size
EU Size
US Size
Cup Letter

✨ Related Calculators

💉 Find your perfect fit
Shop Bras on Amazon →

How Bra Sizes Work

UK bra sizing = band size (underbust in inches, rounded to nearest even number) + cup (difference between bust and band in inches: 1β€³=A, 2β€³=B, 3β€³=C, etc.).

Getting the Right Fit

Frequently Asked Questions

How do I measure my underbust?+
Measure snugly around your ribcage directly under your bust. If odd, round up to the next even number for your band size.
What if I am between sizes?+
Try sister sizes: same cup volume, different band. E.g. 34C = 36B = 32D in cup volume.

Save Your Result

Enter your email to receive your personalised result β€” free!