The Cm to Cup Size Calculator is a practical tool designed to help individuals determine their bra cup size based on their body measurements. By inputting the underbust and bust measurements in centimeters (cm), this calculator accurately determines the difference between the two measurements and translates it into a corresponding cup size. It simplifies a traditionally complex sizing process, ensuring comfort and confidence in your choice of bra.
This calculator is especially useful for those shopping for bras online or seeking clarity about sizing systems across different regions like the US, UK, and Australia.
Formula of Cm To Cup Size Calculator
To calculate your cup size using centimeters, follow these steps:
- Measure your underbust:
Wrap a measuring tape snugly around your ribcage, just below your breasts. Ensure the tape is level and not too tight. - Measure your bust:
Wrap the tape around the fullest part of your breasts, keeping it level and not compressing your chest. - Calculate the difference:
Subtract your underbust measurement from your bust measurement. - Determine your cup size:
Use the chart below to find your cup size based on the difference between your measurements.
Cup Size Chart
| Difference (in cm) | US Cup Size | UK/AU Cup Size |
|---|---|---|
| <2.5 | AA | AA |
| 2.5 – 5.0 | A | A |
| 5.1 – 7.5 | B | B |
| 7.6 – 10.0 | C | C |
| 10.1 – 12.5 | D | D |
| 12.6 – 15.0 | DD/E | DD |
| 15.1 – 17.5 | DDD/F | E |
| 17.6 – 20.0 | DDDD/G | F |
| 20.1 – 22.5 | H | G |
| 22.6 – 25.0 | I | H |
| 25.1 – 27.5 | J | I |
| 27.6 – 30.0 | K | J |
| 30.1 – 32.5 | L | K |
Reference Table
For commonly searched terms, here’s a quick conversion reference for underbust and bust measurements in centimeters and the corresponding cup sizes:
| Underbust (cm) | Bust (cm) | Difference (cm) | US Cup Size |
|---|---|---|---|
| 70 | 75 | 5.0 | A |
| 80 | 90 | 10.0 | D |
| 85 | 100 | 15.0 | DDD/F |
| 95 | 120 | 25.0 | J |
This table helps you visualize the relationship between underbust and bust measurements without performing the calculations manually.
Example of Cm To Cup Size Calculator
Problem:
Your underbust measures 75 cm, and your bust measures 90 cm. What is your cup size?
Solution:
- Measure the difference:
Bust (90 cm) - Underbust (75 cm) = 15 cm - Refer to the chart:
A difference of 15 cm corresponds to DDD/F (US) or E (UK/AU) cup size.
Final Answer:
Your cup size is DDD/F (US) or E (UK/AU).
Most Common FAQs
US and UK sizing systems have slight variations in labeling cup sizes, especially beyond the D range. For example, US sizes often add extra "D"s (e.g., DDD), while the UK uses E, F, and G.
Yes, the calculator provides a reliable foundation for finding your size. However, some brands may have unique sizing variations, so always check the specific size guide for the brand.
If you’re between sizes, consider the fit of the brand you’re purchasing from. Some brands may suggest sizing up for comfort or down for a snugger fit.