[Ceci82]

I like this chart ( AbyDrew85 found it )

http://www.bustnlace.com/page.html?id=20

This still adds inches

Try these best instructions I found but to be honest you shouldn't need a calculater just measure the under bust use that as band size then try on bras for cups.
http://www.sophisticatedpair.com/bracalculator.htm

The Conrad chart still says I should be a 44 E. OMG LOL And the 2nd one says 38H

here another one Iaboy: http://www.soma.com/store/browse/shelf.jsp?cat=Bra+Fit+Guide+Bra+Size+Calculator&subCatId=cat6979291&catId=cat6979288

Thanks Bonita. My under bust is 69/70 cm and my bust 92/93 cm. In Argentina bras come in 80, 85, 90, 95, 100 etc. Am I a 32 D ?