Doe John wrote:

> If so, how much should the sweet condensed milk be watered down by?.

No, no, no, no.
Sweetened condensed milk is a sickenly sweet, goopy, thick concoction
and is in no way anything like whole milk. If you need whole milk for a
recipe why not just go out and get a quart or however much you need.
It's a whole lot cheaper than SCM.