[deMims]

My apologies. Here is the link.
https://abrathatfits.org/calculator.php


The calculator does not give instructions how to step up/down the band size vs down/up the cup size for better fit etc. I find that its a more trail and error way to find what bra fits you the best since the manufactures use such a wide range of measurement and cup size.

I would suggest looking up sister sizing for what you end up wearing.

Thank you for this.