File & Format Converters · Free tool
Bra Size Converter
US ↔ UK ↔ EU ↔ AU bra sizes. Sisterhood-size explainer (32D = 34C = 30DD).
Updated April 2026
Band
US
34
UK
34
EU
75
AU
12
Cup
US
C
UK
C
EU
C
AU
C
Sister sizes — when the band fits but cup is off
Cup volume depends on the band. Move up a band size and drop a cup letter (or vice versa) to keep the same cup volume.
- 32D ≈ 34C ≈ 30DD
- 34B ≈ 36A ≈ 32C
- 36DD ≈ 38D ≈ 34DDD
Band chart
| US | UK | EU | AU |
|---|---|---|---|
| 30 | 30 | 65 | 8 |
| 32 | 32 | 70 | 10 |
| 34 | 34 | 75 | 12 |
| 36 | 36 | 80 | 14 |
| 38 | 38 | 85 | 16 |
| 40 | 40 | 90 | 18 |
| 42 | 42 | 95 | 20 |
| 44 | 44 | 100 | 22 |
Cup chart
| US | UK | EU | AU |
|---|---|---|---|
| A | A | A | A |
| B | B | B | B |
| C | C | C | C |
| D | D | D | D |
| DD | DD | E | DD |
| DDD / F | E | F | E |
| G | FF | G | F |
| H | G | H | G |
| I | GG | I | H |
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What it does
Bra sizing across 4 countries + the sisterhood-size rule (same volume, different band/cup combos). With cup-letter divergence above DD.
Runs entirely in your browser — no upload, no account, no watermark. For more tools in this category see the full tools index.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/bra-size-converter" width="100%" height="720" frameborder="0" loading="lazy" title="Bra Size Converter" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Enter band + cup + country.
- Read all equivalents.
- Check sister sizes.
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