Bra Size Calculator

Difference:

Cup Size (US):

Cup Size (Australia):

Cup Size (UK):

1. What is a Bra Size Calculator?

Definition: This calculator estimates your bra cup size based on your frame measurement (underbust) and bust measurement (fullest part of the bust), providing results for the US, Australia, and UK sizing systems.

Purpose: It helps users find the correct bra cup size by calculating the difference between bust and frame measurements, ensuring a better fit and comfort.

2. How Does the Calculator Work?

The calculator uses the following formula:

\[ \text{Difference} = \text{Bust Measurement} - \text{Frame Measurement} \] The difference determines the cup size based on the following table:

Difference (in [cm])	Cup Size (US)	Cup Size (Australia)	Cup Size (UK)
< 1 [2.5]	AA	AA	AA
1 [2.5]	A	A	A
2 [5.1]	B	B	B
3 [7.6]	C	C	C
4 [10.2]	D	D	D
5 [12.7]	DD/E	DD	DD
6 [15.2]	DDD/F	E	E
7 [17.8]	DDDD/G	F	F
8 [20.3]	H	G	FF
9 [22.9]	I	H	G
10 [25.4]	J	I	GG
11 [27.9]	K	J	H
12 [30.5]	L	K	HH
13 [33]	M	L	J
14 [35.6]	N	M	JJ
15 [38.1]	O	N	K
16 [40.6]	P	O	KK
17 [43.2]	Q	P	L

Unit Conversions:

Frame and Bust Measurements: in, cm (1 in = 2.54 cm)
Difference: Displayed in both in and cm

Steps:

Enter your frame measurement (underbust) and bust measurement, selecting the unit for each (in or cm).
Convert each input to inches if in cm.
Calculate the difference by subtracting frame from bust.
Determine cup sizes based on the difference in inches.
Display the difference (with unit selection) and cup sizes for US, Australia, and UK.

3. Importance of Bra Size Calculation

Calculating your bra size is crucial for:

Comfort: A well-fitting bra reduces discomfort and pain.
Support: Proper cup size ensures adequate breast support, improving posture.
Confidence: The right bra size enhances your appearance and confidence.

4. Using the Calculator

Examples:

Example 1: Frame = 32 in, Bust = 36 in:
- Difference: \(36 - 32 = 4 \, \text{in}\)
- In cm: \(4 \times 2.54 = 10.16 \, \text{cm}\)
- Cup Size (US): D
- Cup Size (Australia): D
- Cup Size (UK): D
Example 2: Frame = 80 cm, Bust = 95.2 cm:
- Convert: Frame = \(80 \div 2.54 = 31.5 \, \text{in}\), Bust = \(95.2 \div 2.54 = 37.5 \, \text{in}\)
- Difference: \(37.5 - 31.5 = 6 \, \text{in}\)
- In cm: \(6 \times 2.54 = 15.24 \, \text{cm}\)
- Cup Size (US): DDD/F
- Cup Size (Australia): E
- Cup Size (UK): E

5. Frequently Asked Questions (FAQ)

Q: What if my measurements are in between sizes?
A: The calculator rounds the difference to determine the closest cup size. You may need to try bras in adjacent sizes for the best fit.

Q: Why do cup sizes differ between countries?
A: Different countries use varying sizing standards, especially for larger cup sizes, leading to differences in labeling (e.g., US DDD/F is E in Australia).

Q: Can I use this calculator without a measuring tape?
A: Yes, you can use a string to measure, then measure the string with a ruler or compare it to a standard object (e.g., a credit card is 3.5 inches long).

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