I was surfing and ran across one of those web sites with links to everything......found this
....it is a site for music calculations..they have string length calculators, a separate guitar page for tuning,...I can barely describe it!
It is buried in this page of 5000+ calculators online
where you can find any kind of calculator imaginable...
and here is the nice lady who provided the list...she has MANY useful links!
be careful....this link could cost you many sleepless nights...or save you much time...depending on your will power!!
(What happened to the LINKS page here where we are supposed to put these things?...I have lost it!!)