Bra Size Calculator
Find your accurate band and cup size for a perfect, supportive fit.
Standard fit with balanced support.
Description
The Bra Size Calculator eliminates the confusion of lingerie shopping by using the two-point measurement system. A common misconception is that cup size is an absolute volume; in reality, it is a relative ratio. This tool calculates the Band Size (the numerical part) and the Cup Size (the alphabetical part) to ensure the weight of the bust is supported by the band rather than just the shoulder straps.
How to Use Guide
- Measure Underbust: Wrap a tape measure snugly around your ribcage, directly under your bust. Keep the tape level.
- Measure Bust: Wrap the tape measure around the fullest part of your chest. Do not pull the tape tight; it should just graze your skin.
- The Result: The tool provides your size in standard US/UK format (e.g., 34C).
- The “Sister Size” Rule: If the band feels too tight but the cup fits perfectly, try going up one band size and down one cup size (e.g., move from a 34C to a 36B).
Key Benefits
- Posture Support: A correctly fitted bra helps distribute weight properly, reducing back and neck strain.
- Comfort First: Helps prevent common issues like “quadra-boob” (cups too small) or “gapping” (cups too large).
- Shopping Efficiency: Provides a reliable starting point before trying on various styles like push-up, balconette, or sports bras.
- Dynamic Advice: Offers specific tips based on the calculated proportions.
Frequently Asked Questions (FAQ)
Why does the tool add 4 or 5 inches to my underbust? This is the traditional “plus-four” method used by most major retailers to determine band size. However, if you prefer a very tight, modern fit, some experts suggest using your underbust measurement directly as the band size.
How often should I re-measure? Body proportions can change due to weight fluctuations, hormones, or exercise. It is recommended to check your size every 6 to 12 months.
What is the “AA” size? AA is used when the bust measurement is almost the same as the band size, indicating a very small difference in volume.