Measure Your Bra Size

Bra Size Calculator

International Bra Size Calculator

Enter your bra size:

Below bust
Across bust






How to measure your bra size

Measure below your breasts (band size)

Using a soft tape measure, measure very snuggly around your rib cage, just beneath your breasts. It should feel tight. Be sure that the tape measure lies straight all the way around. This measurement should be in inches to the nearest half inch. Enter the measurement in the box provided.

Measure around your breasts and back (bust size)

Measure loosely around the fullest part of your bust (usually over the nipples), keeping the tape measure straight all the way around your body. This measurement should be in inches to the nearest half inch. Enter measurement in the box provided

Calculate your bra size

Click on Calculate and your UK bra size together with the international equivalents will be calculated and displayed in the relevant fields.

NOTE:The bra size calculator requires a minimum of 4 inches difference between the under and across bust measurements. Less than this means the cup size is below a AA.

* US = United States of America. UK = United Kingdom. EU = Europe. JAP = Japan. AUS = Australia. NZ = New Zealand. B = Belgium. E = Spain. F = France. P = Portugal.

Use our bra size calculator to help provide you with a starting point to finding the right bra size. To get the perfect fit you will ultimately need to try on a few bras and be willing to move up or down a band size or cup size to get the best fit. Remember, no bra size calculator is perfect. Read our problem with sizing page to find out more about why this is. If you can, visit a good bra fitter who will be able to advise you on what bras fit your shape best.