Bra Size Calculator Usa Cm

Finding the perfect bra size can be tricky, but our bra size calculator makes it easy. Whether you're shopping online or in-store, knowing your measurements in centimeters and USA cup sizes will help you find the right fit. This guide explains how to measure your bust, underbust, and band size accurately.

How to Measure for a Bra Size

Measuring for a bra size requires careful attention to detail. Here's a step-by-step guide to help you get accurate measurements:

Step 1: Measure Your Band Size

The band size is the measurement around the fullest part of your bust. To measure:

Stand in front of a mirror with your arms relaxed at your sides.
Wrap a measuring tape around the fullest part of your bust, keeping it parallel to the ground.
Make sure the tape is snug but not tight enough to dig into your skin.
Record the measurement in centimeters.

Step 2: Measure Your Bust Size

The bust size is the measurement around the fullest part of your bust, but it's taken with your arms raised to your sides. To measure:

Stand in front of a mirror and raise your arms to your sides.
Wrap a measuring tape around the fullest part of your bust, keeping it parallel to the ground.
Make sure the tape is snug but not tight enough to dig into your skin.
Record the measurement in centimeters.

Step 3: Measure Your Underbust Size

The underbust size is the measurement around the narrowest part of your bust, just below the armpits. To measure:

Stand in front of a mirror with your arms relaxed at your sides.
Wrap a measuring tape around the narrowest part of your bust, keeping it parallel to the ground.
Make sure the tape is snug but not tight enough to dig into your skin.
Record the measurement in centimeters.

Tip: Always measure in centimeters for the most accurate results. You can convert your measurements to inches if needed, but centimeters are the standard for bra sizing in the USA.

USA Bra Size Chart

The USA bra size system combines the band size (in inches) with a cup size (A through DD). Here's a general guide to help you understand the sizes:

Band Size (inches)	Cup Size	Approximate Band Size (cm)
30	A	76.2
30	B	76.2
32	B	81.3
32	C	81.3
34	C	86.4
34	D	86.4
36	D	91.4
36	DD	91.4

This chart provides a general guideline, but individual measurements may vary. Always use our bra size calculator for the most accurate results.

How to Choose the Right Bra Size

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

Convert your band size to inches if you measured in centimeters. Use the formula: inches = centimeters ÷ 2.54.
Find your band size in the USA bra size chart above.
Determine your cup size based on the difference between your bust and underbust measurements.
Check the bra size label to ensure it matches your measurements.

Cup Size = (Bust Size - Band Size) ÷ 2.54

For example, if your bust size is 96 cm and your band size is 81 cm:

Convert both measurements to inches: 96 ÷ 2.54 = 37.8 inches, 81 ÷ 2.54 = 31.9 inches.
Subtract the band size from the bust size: 37.8 - 31.9 = 5.9 inches.
Divide by 2.54 to get the cup size: 5.9 ÷ 2.54 ≈ 2.3 inches.
Round to the nearest whole number: 2 inches.
Refer to the USA bra size chart to find the corresponding cup size.

Common Measurement Mistakes

Avoid these common mistakes to ensure accurate bra size measurements:

Measuring with tight tape: Always use a snug but not tight measuring tape to avoid inaccurate results.
Measuring with arms down: Always measure your bust size with arms raised to your sides for the most accurate results.
Measuring at different times: Take all measurements at the same time of day for consistency.
Ignoring the underbust measurement: The underbust measurement is crucial for determining the correct cup size.

Remember, everyone's body is unique, and bra sizes can vary. If you're unsure, consult a professional or try on different sizes to find the best fit.

Frequently Asked Questions

How do I convert centimeters to inches for bra sizing?: To convert centimeters to inches, divide the measurement by 2.54. For example, 96 cm ÷ 2.54 = 37.8 inches.
What is the difference between a band size and a bust size?: The band size is the measurement around the fullest part of your bust, while the bust size is the measurement around the fullest part of your bust with arms raised to your sides.
How do I know if my bra size is correct?: Try on different bra sizes to see which one provides the best support and comfort. The straps should sit comfortably across your shoulders, and the cups should cover your bust without being too tight or too loose.
Can I use a regular measuring tape for bra sizing?: Yes, you can use a regular measuring tape, but make sure it's flexible and not too tight. For the most accurate results, use a soft, stretchy measuring tape designed for clothing.
What should I do if I can't find my exact bra size?: If you can't find your exact bra size, try sizes that are slightly larger or smaller. You can also consult a professional or use a bra size converter to find the closest match.