BRA SIZE Calculator

What is the Bra Size Calculator?

Finding the right bra size doesn't have to be a mystery. This free Bra Size Calculator uses the industry-standard band size + cup size method to determine your perfect fit based on two simple measurements: your underbust (band) and bust.

Whether you're a first-timer, recently gained/lost weight, or just tired of uncomfortable bras, this tool works in both metric (cm) and imperial (inches) for users worldwide. It supports all standard sizes from AA to J cups and band sizes from 28 to 50+.

For more sizing tools and fashion guidance, visit Toolyfy or check trusted resources like Shyaway Bra Size Calculator.

Related Tools: Body Fat Calculator | BMI Calculator

How to Use the Bra Size Calculator

1. Choose your Unit System (metric cm or imperial inches).
2. Measure your Underbust (snug band measurement around your ribcage, directly under your bust).
3. Measure your Bust (fullest part of your chest).
4. Click "Calculate Bra Size" to get your exact band and cup size.
5. Pro tip: Wear an unpadded bra or no bra for the most accurate measurement!

How Does Bra Sizing Work?

Bra sizing is based on two measurements:

1. Band Size: Measured snugly around your ribcage, directly under your bust. This is your bra circumference (28, 30, 32, 34, etc. inches or equivalent in cm).

2. Cup Size: Calculated by the difference between your bust and underbust measurements. Each inch of difference equals one cup size (AA, A, B, C, D, DD, E, F, etc.).

This internationally standardized method is used by brands worldwide and trusted resources like Shyaway, Zivame, and Enamor.

For more body measurement tools, try our Body Fat Calculator or BMI Calculator.

Pro Tips for Perfect Fitting

• Measure correctly: Stand straight, don't slouch. Use a soft measuring tape, not a ruler.
• Wear neutral: Measure in an unpadded bra or no bra for accuracy.
• Check your strap: The back of your bra should sit parallel to the ground, not riding up.
• Account for spillage: If you have overflow, try a larger cup size—band size stays the same.
• Brand variations: European, UK, and US sizing differ—always check the brand's size chart.
• Recalculate: Refit every 6 months or after weight changes.

Learn more from reputable resources like bra fitting experts or Toolyfy's sizing tools.

FAQ: Bra Size Calculator

Why does my bra size feel different across brands?

Bra sizing varies by brand, country, and style. A 34B in one brand may fit like a 34C in another. Always try on and refer to the specific brand's size chart.

Does weight gain/loss affect bra size?

Yes. Both your band and cup size can change with weight fluctuations. Recalculate every 6 months.

What if I'm between two sizes?

Go down a band size and up a cup size (or vice versa). For example, if you're between 36C and 38B, try both—comfort is key!

Is there a bra size conversion chart?

Yes. US (32A), UK (32A), and EU (65A) sizing differ. Always check your brand's conversion before ordering online.

Related tools:
Percentage Calculator | Age Calculator

Comfort Starts with the Right Fit

An ill-fitting bra affects not just comfort but also your posture, confidence, and health. This calculator takes the guesswork out of sizing—but remember, every body is unique. Don't hesitate to visit a professional fitter or try multiple sizes before settling on the perfect bra. For more tools and tips, visit Toolyfy and bookmark this calculator for future reference!