3 Step Bra Size Calculator

How To Measure Your Bra Size

Bra Size Calculator - Finding the right bra size is easier than you might think, once you understand how bra sizes and measuring works. There are a couple of options available when it comes to determining bra size.

The first and recommended choice is to have a professional bra fitter from a lingerie boutique or department store measure you.

The second is to measure yourself (or get a friend to help). If, you've decided on this option you've come to the right place.

In 3 quick steps, take 2 simple measurements, subtract them for a third measurement and voila you have a good approximation of your bra size.

Where to start? We'll take you through it step by step and show you exactly what to do.

Step One

You'll need a soft measuring tape, a pen and paper, and the bra size calculator below...

Once you change into your most comfortable bra (no padding please!) you're ready to start.

Starting from the back, hold the measuring tape taut and take the measurement around your ribcage, directly under your bust...snugly but not too tight.

Carmen's Tip

Here is an important lingerie tip to get the correct bra size - keep the measuring tape straight & parallel to the floor; not angled in any way. This will give you a more accurate bra measurement.

Next, round this measurement to the nearest inch. So, for example if you measured 33 1/4", round up to 33"...if you measured 32 1/2", round down to 32". Write this down.

Now, to get your band measurement, take the number you wrote down and add 5" to it if it's and odd number...if it's even number then you add 4". Here's how it works...

 odd number + 5" = band
even number + 4" = band

bra size calculator

Step Two

To determine your cup size, start from the middle of your back, hold the measuring tape and measure lightly all the way around the fullest part of your bust. Again, keep the tape in a straight line parallel to the floor, so you'll get the correct measurement.

Round this number to the nearest inch. So, for example if you measured 33 1/4", round down to 33"...if you measured anything above 32 1/2", round up to 33". Write this number down.

Now, take the band size (this is the 1st measurement that you wrote down) and subtract it from the (2nd) measurement.

Write this number down. Then, scroll down the chart below and find this number. This will give you your cup size.

Keep in mind that this method of determining bra sizes is used only as a guideline. Bra styles, sizes and fabrics do vary from one bra manufacturer to another. For example your favorite Bali bras may not have the same bra fit as a Chantelle bra in the same size.

So, it is important to be flexible with the size tag since it can differ.

Bra Size Calculator

Difference Between Band
And Fullest Part Of Bust
Cup Size
0 to1/2" AA
1/2"to 1" A
2" B
3" C
4" D
5" DD or E
6" DDD or F
7" G
8" H
9 I
10" J

bra fitting

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