Bra size calculator to estimate an approximate bra size from underbust and bust measurements. Enter measurements in cm or inches and compare estimated sizes across US, UK, EU, FR, and IT systems.
Use this bra size calculator to estimate a starting bra size from two measurements: underbust and bust. It is useful when you want a quick reference before ordering online or when you need to compare common sizing systems without working through a chart manually.
The result is approximate. Bra fit can vary noticeably by brand, style, padding, fabric stretch, and personal comfort preference, so use the estimate as a starting point rather than a guarantee.
Fit tip: Measure with the tape level around the body and snug, but not tight. Use this result as a starting point and compare it with the brand’s own size chart if possible.
Initial Data
Equivalent sizes
| US | - |
|---|---|
| UK | - |
| EU | - |
| France | - |
| Italy | - |
| Bust - band | - |
Estimate only. Bra sizing varies by brand, style, fabric, and personal fit preference.
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