How accurate is this bra size calculator?

It provides a starting point based on standard charts. Due to lack of standardization, always try bras on. Consider sister sizes if the calculated size does not fit perfectly.

What are sister sizes?

Sister sizes share the same cup volume but different band sizes. 34C, 36B, and 32D are sister sizes. Go up a band/down a cup, or down a band/up a cup.

Fashion & Wearables

Bra Size Calculator

Calculate your bra size in US, UK, EU, French, Belgian, Spanish, Australian, and New Zealand formats. Enter bust and band measurements in inches or centimeters for instant, accurate sizing with international converter.

📏 Measurements

Units

Bust Size — loose circumference over fullest part (inches)

Band Size — firm measurement directly under breasts (inches)

🔄 Size Converter

Location

Band Size

Cup