Women can calculate their bra size by visiting a professional bra fitter or by measuring around the area directly under the breasts and the fullest part of the chest. The calculations needed to come up with an accurate bra size are simple addition.Continue Reading
Begin by putting on an unpadded bra and getting a measuring tape.
Measure around the bottom of the bra band, directly under the bust. Make sure the measuring tape is snug.
Round the size to the nearest whole number. If the measurement is even, add 4 inches. If the measurement is odd, add 5 inches. For example, if the measurement is 36 inches, the band size is 40.
Measure the fullest part of the bust, at nipple level. Round to the nearest whole number.
To calculate cup size, subtract the band size from the bust size. For instance, if the bust size is 37 inches and the band size is 34 inches, the result is 3 inches. This number can then be used to determine the letter with the help of the rules below. In this example, the size would be a 34C.