My Bra Size
Find a more accurate bra size in seconds using underbust + bust measurements—simple, fast, and responsive on any device.
Tip: For best accuracy, measure in inches with a snug (not tight) tape, keeping it level around your body.
Bra Size Calculator Tool
Enter your underbust and bust measurements (in inches). The tool calculates your band size, cup size, and final bra size instantly.
Logic note: Band size is rounded to the nearest even number. Cup size is based on the difference between bust and band in inches (A=1, B=2, C=3, ...).
Results update dynamically. If values change, recalculation is instant.
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This is a helpful starting point. Different brands and styles may fit differently—use your result as a baseline for comfort.
Why accurate sizing matters
A better fit can improve comfort, support, posture, and confidence—especially when your measurements change over time.
Using a Bra Size Calculator tool helps you quickly turn two simple measurements into a practical starting size. Many people wear the wrong size because band and cup work together—if one changes, the other often needs adjustment too.
Benefits of using our Bra Size Calculator tool include faster shopping decisions, fewer returns, and a clearer idea of what to try on first. When you begin with a reasonable band size and cup size, it’s easier to fine-tune for style differences like plunge, full coverage, sports bras, or wireless designs.
Accurate sizing matters because the band provides most of the support. If the band is too loose, straps may dig in and cups can gap. If the band is too tight, comfort suffers and the fit can feel restrictive. A well-built Bra Size Calculator tool focuses on the relationship between your underbust and bust so your result is balanced—not guessed.
For best results, re-check your measurements occasionally and use this Bra Size Calculator tool as your baseline. Small differences (even half an inch) can change cup size, so measure carefully and keep the tape level.
Contact Us
Have a question about measurements or fit? Send a message—this form can be connected to your backend later.
Quick measuring tips
- Measure underbust snug and level, breathe normally.
- Measure bust at fullest point, keep tape parallel to the floor.
- If between cup sizes, try both for comfort and coverage.
- Different brands fit differently—use your result as a starting point.
Privacy: Your message stays in your browser in this demo. No tracking scripts, no external libraries.