Bra Size Calculator
Brafitly provides a free bra size calculator that estimates your size across multiple international sizing systems. U...

What Bra Size Calculator does
Brafitly is a free bra size calculator that estimates your size across multiple international sizing systems. Users enter their underbust and bust measurements once to receive a starting-point estimate in UK, US, EU, French, Australian/NZ, Canadian, and Indian sizes. The tool includes sister size references and dedicated pregnancy and nursing calculators, addressing unique fitting needs during those stages. Results are processed in the browser, so no account is required. The site also links to detailed measurement guides and bra size charts for further reference.
How to use the Brafitly Bra Size Calculator
- 1
Use a soft measuring tape to measure firmly around the ribcage directly below the bust for the underbust measurement
- 2
Measure around the fullest part of the bust without compressing the tissue for the bust measurement
- 3
Enter both measurements in the same unit (inches or centimetres) into the calculator fields
- 4
View the estimated primary size and sister size equivalents across seven international sizing systems
- 5
Compare the result with the specific brand's size chart before purchasing, as fit varies by style and fabric
Best for
Anyone needing a quick, measurement-based bra size estimate who plans to shop across international brands or during pregnancy and nursing, thanks to the tool’s multi-system output and specialized calculators.
Limitations
- Bra sizing is not globally standardized, so brand, style, and fabric can change the actual fit
- Results are estimates only and should be verified against the specific brand’s current size chart
- The calculator provides starting-point sizes; professional fitting is recommended for complex fits
Bra Size Calculator FAQ
- Can I use Brafitly if I only know my underbust or only my bust measurement?
- 1-3 sentence answer grounded in the material
- Does Brafitly support measurement units other than inches and centimetres?
- 1-3 sentence answer grounded in the material
- Are the size recommendations from Brafitly accurate for all bra brands?
- 1-3 sentence answer grounded in the material
- Is there a way to save or print my bra size results from Brafitly?
- 1-3 sentence answer grounded in the material
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