Calculate Bra Cup Size

Finding the right bra size is crucial for comfort, support, and the overall look of your clothing. Many women wear the wrong bra size, leading to discomfort, poor posture, and an ill-fitting appearance. Our Bra Cup Size Calculator helps you determine your approximate bra size based on two simple measurements.

Why Is Bra Size Important?

A well-fitting bra provides adequate support, prevents back and shoulder pain, and enhances your silhouette. An ill-fitting bra, on the other hand, can cause:

• Shoulder indentations from straps digging in
• Back pain due to lack of support
• Breast tissue spillage over the cups or under the arms
• Cups gaping or wrinkling
• The band riding up your back

Using this calculator is a great starting point to understanding your body's unique measurements.

How to Measure for Your Bra Size

You'll need a soft measuring tape and ideally, a non-padded bra that fits well (or no bra at all for the most accurate results). Make sure the tape is snug but not tight, and parallel to the floor.

1. Underbust Measurement (Band Size)

Measure around your rib cage directly under your bust, where your bra band would sit. Exhale fully to get the smallest measurement. This measurement will help determine your band size.

2. Bust Measurement (Cup Size)

Measure around the fullest part of your bust. Ensure the tape measure is level across your back and not pulled too tight. This measurement, in conjunction with your underbust measurement, will determine your cup size.

How the Bra Cup Size Calculator Works

Our calculator uses a common method to determine your bra size:

1. Band Size: Your underbust measurement is typically rounded to the nearest even number. For example, if your underbust is 29 inches, your band size would be 30. If it's 30 inches, it's 30. If it's 31 inches, it's 32.
2. Cup Size: The difference between your bust measurement and your underbust measurement determines your cup letter. Each inch of difference generally corresponds to a cup size increment (e.g., 1 inch difference = A cup, 2 inches = B cup, and so on).

Keep in mind that bra sizing can vary slightly between brands and countries (e.g., US, UK, EU sizing). This calculator provides a standard US/UK approximation.

Bra Cup Size Calculator

Examples of Bra Size Calculation

Let's look at a few examples to illustrate how the calculator works:

• Example 1:
  • Underbust Measurement: 30 inches
  • Bust Measurement: 33 inches
  • Calculation: Band size is 30. Bust difference is 33 – 30 = 3 inches.
  • Result: 30C
• Example 2:
  • Underbust Measurement: 34.5 inches
  • Bust Measurement: 39 inches
  • Calculation: Band size is rounded to 34. Bust difference is 39 – 34.5 = 4.5 inches.
  • Result: 34DD (or 34E in some systems)
• Example 3:
  • Underbust Measurement: 28 inches
  • Bust Measurement: 29 inches
  • Calculation: Band size is 28. Bust difference is 29 – 28 = 1 inch.
  • Result: 28A

Important Considerations

While this calculator provides a good starting point, remember that:

• Brand Variations: Sizing can differ between brands.
• Body Shape: Breast shape and density can influence how a bra fits.
• Professional Fitting: For the most accurate and comfortable fit, consider getting professionally fitted at a lingerie store.
• Comfort is Key: Ultimately, the best bra size is the one that feels most comfortable and supportive for you.

Use this tool as a guide to narrow down your options, and then try on different sizes and styles to find your perfect bra.

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