Mark Treleaven

Is there a formula where I can enter what my current caster angle is, current length my lowers are adjusted to, and what my uppers are adjusted to, and find out how much farther I need to adjust my uppers?
i used the length chart that floats around the interwebs but my uppers ended up too short and i need to crank them out a bit more.

hoping to do it in one shot, and i feel like there should be a way to math it out so it's a one step process.