Bra Size Calculator

To calculate your bra size, you will need a soft measuring tape, and for best results, either remove your bra or wear the bra that fits you best.  Measure directly underneath your breasts on the rib cage, making sure to keep the tape level all the way around your torso.

Pull the two sides together until they meet and lie flat against your body, but be careful not to pull too tightly. The tape should feel snug, but not constricting. Enter this as your Band Measurement.  Next, measure around the fullest part of your breasts to find your Bust Measurement.

Do not round any of these measurements as the calculator accepts decimals.  Please note:  Our calculator only offers a starting point size. There is no substitute for a professional fitting or for trying on bras to see which styles and sizes work best for you.

Band measurement:
Bust measurement:

Our calculator was the first to allow centimeter conversion as well as decimal input. Calculator is ©W2 Consulting Services, LLC under closed-source.  For licensing, please contact

A Sophisticated Pair

1143E St. Mark's Church Road
Burlington, NC 27215
Tuesday-Friday: 10:30am to 6pm
Saturday: 10am to 5pm
Monday-Sunday: By Appointment
t: (336) 270-6744

Proper Fit Criteria

  • Your band should fit snug (but not tight) on the loosest set of hooks.

  • The band of your bra should be centered across your back with the straps adjusted to the tops of the shoulders.

  • The band should not ride up the back or cause the straps to fall off the shoulders.

  • At least 80% of the support from your bra comes from the band, so it is important that the band fits perfectly.

  • When you lift your arms or move your body, the bra should stay in place, without moving or needing to be readjusted.

  • Adjust your straps. Properly fitted straps will pull the cup against your breast but not dig into the shoulders nor will they slip or move.

  • The underwire of a bra should encase the breasts and rest firmly against your ribcage, especially in the center where the underwire meets. The wire should sit flat and not press into tissue.

  • The underwire on the side of the torso should not mash your breasts or dig into the skin. It should fully encapsulate all of the breast tissue on the side without creating extra empty space. Make sure to scoop side breast tissue into the cups.

  • The cups should encapsulate breast tissue and be filled out and shaped by your breasts.

  • The cups should not allow breast tissue to spill over the top or the sides nor should they pucker or gape.