Bra Size Converter
By using our calculators, you agree to our Terms of Use.
US band and cup to UK and EU equivalents — planning estimate only.
Rates last reviewed: July 2026
Your bra size
EU size
75C
UK 34C · US 34C
- UK
- 34C
- US
- 34C
- Underbust (approx.)
- 70 cm
Related calculators
Bra size systems
Bra sizing uses band size (around the ribcage) and cup letter (volume relative to band). US and UK often share band numbers; EU bands use centimeters (70, 75, 80…). Cup letters are not identical across regions — DD in US may map to E in EU.
This converter uses common retail crosswalks for standard sizes. Full-bust and specialty brands use different grading — always try on or check the brand chart before buying.
Example: US 34C ≈ UK 34C, EU 75C. US 36DD ≈ UK 36DD, EU 80E. Underbust in cm is approximate from the EU band label.
Common questions
Why don't EU and US cups match exactly?
Each region increments cup volume differently. EU often uses 2 cm per cup step on the same band; US uses 1 inch. Treat output as a starting point.
How do I measure band size?
Measure snugly under the bust in inches, round to nearest even number for US sizing — or use a brand fit guide. This tool converts labeled sizes, not raw measurements.
Does this include sister sizes?
No. Sister sizes (same cup volume, different band) are a separate lookup — e.g., 34C and 32D.