Bra Size Calculator
Calculate your bra size from band and bust measurements. Get US, UK, and EU sizes plus sister sizes.
Inputs
in
in
Results
US Bra Size
34C
Band Size34
Cup SizeC
UK Size34C
EU Size85C
Sister Size (smaller band)32D
Sister Size (larger band)36B
Bust-Band Difference3 in
How to Use This Calculator
- Measure your underbust (band) and fullest bust measurements in inches.
- Enter Band Measurement (in) and Bust Measurement (in) — use a soft measuring tape snug but not tight.
- Review US Bra Size, Band Size, and Cup Size as primary outputs.
- Check UK Size and EU Size if shopping international brands.
- Use Sister Size Smaller and Sister Size Larger if your primary size is unavailable — same cup volume, different band.
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