Usa Bra Size Calculator

Finding the perfect bra size can be tricky, but our USA Bra Size Calculator makes it easy. Whether you're shopping online or in-store, knowing your measurements will help you find the right fit. This guide explains how to measure yourself accurately and understand the USA bra size chart.

How to Measure for a Bra

Measuring for a bra requires precision. Follow these steps to get accurate measurements:

Step 1: Measure Your Band Size

Wrap a soft measuring tape around your ribcage, just under your arms, and across your fullest part. Make sure the tape is snug but not tight. Record this measurement in inches.

Step 2: Measure Your Cup Size

With the measuring tape, measure around your fullest part of your bust. Subtract your band size from this measurement to determine your cup size.

Cup Size Formula:

Cup Size = (Bust Measurement - Band Size) × 2

Step 3: Convert to USA Bra Size

Use our calculator to convert your measurements to the standard USA bra size format (e.g., 34B).

USA Bra Size Chart

The USA bra size system uses a combination of band size and cup size. Here's a quick reference:

Band Size (inches)	Cup Size	USA Bra Size
30	A	30A
32	B	32B
34	C	34C
36	D	36D
38	DD	38DD

Note: Cup sizes can range from A to DD, with DD being the largest standard size.

How to Choose Your Bra Size

Once you have your measurements, follow these steps to choose your bra size:

Find your band size on the chart above.
Determine your cup size using the formula provided.
Combine the two to get your USA bra size (e.g., 34B).
Check the bra's label to ensure it matches your size.

If you're between sizes, consider sizing up for comfort. Many women find that a slightly larger band size is more comfortable than a tight fit.

Common Measurement Mistakes

Avoid these mistakes to ensure accurate measurements:

Measuring over your shoulders instead of under your arms.
Using a measuring tape that's too tight or too loose.
Rounding measurements instead of using exact numbers.
Ignoring the difference between band size and cup size.

Double-check your measurements for accuracy before purchasing a bra.

Frequently Asked Questions

How often should I measure my bra size?: It's a good idea to measure yourself every 6-12 months, especially if you've gained or lost weight.
Can I use a regular measuring tape for my bra?: Yes, but make sure it's soft and flexible. Avoid metal or stiff tapes.
What if I can't find my exact size?: Try sizing up for a more comfortable fit. Many brands offer extended sizes.
How do I know if my bra fits properly?: Your bra should feel snug but not tight, with no gaps at the sides or under the arms.
Can I use this calculator for international sizes?: This calculator is specifically for USA bra sizes. For other countries, use the appropriate size chart.