Calculate Bra Size Usa
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Reviewed by Calculator Editorial Team
Finding the perfect bra size can be confusing, but our calculator makes it easy. Follow these steps to measure your bust and determine your bra size in the USA system.
How to Measure Your Bra Size
Measuring your bra size correctly is essential for finding the perfect fit. Here's a step-by-step guide:
- Stand in front of a full-length mirror with your arms relaxed at your sides.
- Measure around the fullest part of your bust, just under your arms and above your bra straps.
- Measure around your back, just under your shoulder blades.
- Measure around your waist, just above your belly button.
- Use our calculator below to determine your bra size based on these measurements.
For the most accurate results, measure your bust when you're not wearing a bra or other clothing that could affect the measurement.
USA Bra Size Chart
The USA bra size system uses a combination of band size (in inches) and cup size (letters A through DD). Here's a quick reference:
| Band Size (inches) | Cup Size | Bra Size |
|---|---|---|
| 30 | A | 30A |
| 30 | B | 30B |
| 32 | C | 32C |
| 34 | D | 34D |
| 36 | DD | 36DD |
Formula used: Bra size = Band size (inches) + Cup size (letter)
Understanding Cup Sizes
Cup sizes in the USA system are determined by the difference between your bust measurement and your band size. Here's how it works:
- Band size is the measurement around the fullest part of your bust.
- Cup size is calculated by subtracting the band size from the bust measurement.
- The result is rounded to the nearest even number to determine the cup size.
For example, if your bust measures 36 inches and your band size is 32 inches, your cup size would be 4 inches (36 - 32 = 4). This would correspond to a cup size of D.
Common Measurement Mistakes
Avoid these common errors when measuring your bra size:
- Measuring while wearing a bra - This can give you an incorrect band size.
- Measuring too high or too low - Always measure at the fullest part of your bust.
- Not measuring your back - This is important for determining the correct band size.
- Ignoring your waist measurement - This can help determine if you need a larger or smaller band size.
FAQ
- How do I know if my bra size is correct?
- Your bra should fit snugly under your bust but not dig into your skin. The straps should sit comfortably on your shoulders, and the cups should cover your breasts without spilling over.
- What if I can't find my exact bra size?
- Many brands offer adjustable bras or extended sizes. You can also try a size up or down to find the best fit.
- How often should I measure my bra size?
- It's a good idea to measure your bra size whenever you gain or lose significant weight, or if you notice your measurements changing.
- Are there different bra size systems in the USA?
- Yes, some brands use their own size charts, but the standard USA bra size system is widely recognized and used by most retailers.
- What if my measurements don't match the standard chart?
- If your measurements don't fit neatly into the standard chart, you may need to consult a professional fitting service or try a different brand that offers more size options.