The Bra Size Calculator is a specialized tool designed to help women accurately determine their correct bra size, ensuring comfort, support, and health. This tool uses specific measurements of the bust and underbust to calculate the appropriate band and cup size, eliminating common sizing errors and discomfort associated with wearing incorrectly sized bras.
Formula of Bra Size Calculator
Step 1: Measure Band Size
Measure the underbust:
- Wrap a measuring tape snugly around your ribcage, just under your bust. Record this measurement in inches.
Calculate the band size:
- If the underbust measurement is an even number, add 4 inches.
- If the underbust measurement is an odd number, add 5 inches.
- Band Size = Underbust Measurement (in inches) + 4 (if even) or + 5 (if odd)
Step 2: Measure Bust Size
Measure the bust:
- Wrap the measuring tape around the fullest part of your bust, keeping it parallel to the ground. Record this measurement in inches.
Step 3: Calculate Cup Size
Calculate the difference:
- Subtract the band size from the bust measurement.
- Cup Size Difference = Bust Measurement (in inches) - Band Size (in inches)
Determine the cup size:
- Use the difference calculated above to find the cup size using the following guide:
- 0 inches: AA
- 1 inch: A
- 2 inches: B
- 3 inches: C
- 4 inches: D
- 5 inches: DD/E
- 6 inches: DDD/F
- 7 inches: G
- 8 inches: H
- 9 inches: I
Table for General Terms
| Term | Definition |
|---|---|
| Band Size | The circumference around the rib cage just under the bust, used as a key measurement for bra sizing. |
| Cup Size | Determined by the difference between bust size and band size, indicates the volume of the breast. |
| Underbust | The area directly under the breasts where the bra band sits. |
| Bust Measurement | The fullest part of the chest, used to determine cup size in conjunction with band size. |
Example of Bra Size Calculator
Consider a woman with an underbust measurement of 29 inches and a bust measurement of 34 inches.
Calculations:
- Band Size: 29 (odd) + 5 = 34 inches
- Bust Measurement: 34 inches
- Cup Size Difference: 34 (bust) - 34 (band) = 0 inches
- Cup Size: AA
This calculation suggests a bra size of 34AA.
Most Common FAQs
It's recommended to measure your bra size at least once a year or after any significant change in weight, pregnancy, or overall health to ensure the best fit.
If your measurements fall between sizes, it's usually best to try both sizes or consider a sister size. A sister size has a different band and cup combination but offers a similar fit.
Yes, bra sizes can vary between brands due to differences in sizing standards and styles. Always check the specific brand's sizing chart or try on different styles to find the best fit.