Bra Size (Bra Size) Calculator
Compute cup size from under-bust and bust.
Input Data
Band
Bust
Results
15
差值 = 15 cm；約 F/DDD 罩杯（每 2.5cm 一級，品牌差異大）。
At a glance:Compute cup size from under-bust and bust.
Formula
Cup = bust − under-bust; one cup level per 2.5cm.
How to Use
- Enter under-bust and bust in cm.
- The calculator returns the cup difference and size note.
FAQ
How accurate is it?
It is an approximation; actual sizing varies greatly across brands.
Where is it applied?
Lingerie and bra shopping guidance.
How precise is it?
The difference is rounded to one decimal place.
Related Tools
References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.