Expert Reviewed by: David Chen, CFA & Health Data Analyst • Updated June 2024
Stop wearing the wrong size. Our Bra That Fits Calculator uses professional-grade measurements to find your true band and cup size, ensuring maximum comfort and support based on anatomical data.
Bra That Fits Calculator
Bra That Fits Calculator Formula:
Band Size = Rounded even integer of Underbust.
Cup Size = Index of (Bust – Band Size) difference.
Formula Source: Healthline Medical Standards and Real Simple Fashion Guide.
Variables:
- Underbust: The measurement directly under your breasts where the band sits.
- Fullest Bust: The measurement around the fullest part of your chest.
- Difference: The numeric gap between bust and band used to determine the letter (e.g., 1″ = A).
Related Calculators:
What is Bra That Fits Calculator?
A “Bra That Fits Calculator” is a specialized tool designed to solve the common problem of wearing incorrectly sized lingerie. Statistics suggest that over 80% of women wear the wrong bra size, leading to back pain, poor posture, and discomfort.
By inputting precise measurements of your underbust and bust, this tool uses standardized sizing charts (US/UK) to eliminate guesswork. It focuses on the mathematical relationship between the ribcage circumference and breast volume.
How to Calculate Bra Size (Example):
- Measure your underbust tightly. Example: 31.5 inches. Round to 32 (Band Size).
- Measure your fullest bust while wearing a non-padded bra. Example: 35 inches.
- Subtract: 35″ – 32″ = 3″.
- A 3-inch difference corresponds to a ‘C’ cup. Final Size: 32C.
Frequently Asked Questions (FAQ):
What if my measurement is between sizes? Generally, it is recommended to size up in the band for comfort if you are between even numbers.
Why does my size vary between brands? Manufacturing tolerances and materials (stretchiness) differ, but the calculator provides your true anatomical baseline.
Should I measure while wearing a bra? For the most accurate “bra that fits” result, measure braless or with a very thin, non-padded bra.
How often should I recalculate? It is best to check your size every 6 months or after significant weight changes.