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Bra Size Calculator
Bra Size Calculator — Free on-device bra size calculator: inches or cm, US/UK/EU/FR/AU labels, sister sizes, fit journal—no account.
About Bra Size Calculator
Bra Size Calculator turns underbust and bust measurements into a starting band and cup size. Supports quick or six-measurement modes, sister sizes, US/UK/EU/FR/AU conversions, and an optional try-on journal. Measurements stay on your device. A size to try—not a guarantee of fit.
- Who it is for
- Free on-device bra size calculator: inches or cm, US/UK/EU/FR/AU labels, sister sizes, fit journal—no account.
- Problem it solves
- Bra Size Calculator turns underbust and bust measurements into a starting band and cup size.
- The solution
- Supports quick or six-measurement modes, sister sizes, US/UK/EU/FR/AU conversions, and an optional try-on journal.
- What makes it unique
- Measurements stay on your device. A size to try—not a guarantee of fit.
Features
Quick or six-measurement modes
Supports quick or six-measurement modes, sister sizes, US/UK/EU/FR/AU conversions, and an optional try-on journal.
Sister sizes
Supports quick or six-measurement modes, sister sizes, US/UK/EU/FR/AU conversions, and an optional try-on journal.
US/UK/EU/FR/AU conversions
Supports quick or six-measurement modes, sister sizes, US/UK/EU/FR/AU conversions, and an optional try-on journal.
Optional try-on journal
Supports quick or six-measurement modes, sister sizes, US/UK/EU/FR/AU conversions, and an optional try-on journal.
Measurements stay on your device
Measurements stay on your device. A size to try—not a guarantee of fit.
Details
- Platforms
- Web
- Pricing
- Free
- Built for
Free on-device bra size calculator: inches or cm, US/UK/EU/FR/AU labels, sister sizes, fit journal—no account.
- Building since
2026
Technology
Bra Size Calculator product screenshot
1 / 3Domain Rating
Domain Rating by Ahrefs- DR4 (primary model)
- 7
First DR4 reading
- DR3
- 17
First DR3 reading
Model difference−10. DR4 is 10 points lower than DR3.
Measured · brasizecalculator.app
What do DR4, DR3 and the model difference mean?
- DR4:
- Ahrefs' newer model. It gives more weight to links from sites with organic search traffic and rates a subdomain on its own links.
- DR3:
- The previous model, shown in the Ahrefs app until 1 December 2026.
- Model difference:
- DR4 minus DR3 for the same domain. The models calculate differently, so this is not growth or a drop; the “since” lines compare each model with itself.
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