Bra Size Calculator

Bra Size Calculator

This calculator estimates bra size based on bust size and band size (frame size). To ensure accuracy, measure to the nearest ¼ inch or ½ cm. Results are provided for US, UK, EU, France/Belgium/Spain, and Australia/New Zealand.

i Modify the values and click the Calculate button to use

The bust size is the loose circumference measured around the chest over the fullest part of the breasts.

The band size is the firm circumference measured directly underneath the breasts.

📏 Results
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Enter your measurements and click Calculate to see results.

US/CA Size
Note: Bra sizing varies between manufacturers. These results are approximate. We recommend trying on bras and consulting a fitting specialist for the best fit.

Bra Size Converter

Convert bra sizes between different locations.

Band Size Reference

SizeFR/BE/ESEUUS & UKAU/NZ

Cup Size Reference

Difference (in)US CupUK/AU Cup

What is a bra size calculator? 

A bra size calculator is a simple tool that uses your band size and bust size to propose the right size for you. It provides you a better notion based on your body instead of making you guess.

It can be hard and nerve racking to discover the right length bra. A lot of girls use bras which might be nearly the proper size but not quite. That is why a bra size calculator can be quite beneficial. It makes matters easier and enables you to find out a match this is supportive while not having to guess.

Why Finding the Right Bra Size Matters

Wearing the wrong size bra not only changes how you look but it also changes how you feel. A bra that does not fit right can make you feel:

  • Pain in the neck and shoulders
  • Pain in the back
  • Irritation or markings on the skin
  • Bad posture
  • The desire to constantly change your bra

Bra size calculator supports your body improves your posture and makes your clothes seem nicer. That is why it is a good idea to use a bra size calculator.

How to Get the Right Size Bra

You need to measure yourself correctly before using a calculator. Do not worry it is really easy.

1. Measure Your Band Size (Underbust)

Put a delicate measuring tape across your ribs right below your bust.

  • Not too tight but snug
  • Keep the tape straight across your back.
  • Make the number a whole number.
  • This number tells you how big your band is.

2. Measure Your Bust Size

Put the tape around the biggest area of your bust.

  • Do not make it too tight keep it loose.
  • Keep your arms relaxed at your sides while standing straight.

This tells you how big your bust is.

3. Find the Difference

Find the difference between your bust and band measurements. The difference shows you your cup size:

  • 1 inch = A cup
  • 2 inches = B cup
  • 3 inches = C cup
  • 4 inches = D cup
  • 5 inches = DD/E

Most bra size calculator tools do this for you automatically.

Example of a calculation

  • Band size = 34 inches
  • Bust size = 37 inches
  • Difference = 3 inches → C cup

Your bra size would be 34C.

Common Mistakes When Measuring Bra Size

Even with a bra size calculator, you can still make mistakes. Here are some that are common:

1. Measuring too tightly or too loosely

The tape should be tight but not so tight that it hurts your skin.

2. Wearing a Padded Bra

Bra padding can give you the wrong size.

3. Tape Not Straight

Your size will be inaccurate if the tape is not level at the back.

4. Ignoring Body Changes

You should measure yourself often because your size can fluctuate.

Signs Your Bra Does not Fit Properly

Not sure if your bra fits? The signs to look for:

  • The band goes up at the back.
  • The straps pinch against your shoulders.
  • The cups are either too tight or too loose.
  • The central half doesn’t sit flat.

If you see them try using a bra size calculator again.

How to Get the Perfect Fit

The first step is to get your size. Here are some simple tips:

  • Begin with the Calculator Result
  • Try out other styles
  • Look at the Band First
  • Change the straps
  • Get up and move

Can You Measure Without a Tape?

You can still measure without a tape:

  • Use a ribbon or string
  • Put it around your body
  • Mark the length
  • Use a ruler to measure it.

After that put those values into a bra size calculator.

Conclusion

Finding the proper bra size does not have to be hard. With a great Bra Size Calculator accurate measurements you can find a bra that feels supportive. Remember bra sizing is not best it is approximately what feels exceptional for you.

Use the Bra Size Calculator as a guide believe your consolation and strive for specific sizes if needed. When your bra suits nicely you may experience greater comfort and confidence every day.