I am stuck at my in-laws so no game this weekend. Learned to do drop downs in excel, so here is a Stealth bonus Calculator, just click to change the options.

Stealth Calculator.zip

Modifiers
Size Creatures gain a bonus or penalty on Stealth checks based on their size: Fine +16, Diminutive +12, Tiny +8, Small +4, Medium +0, Large –4, Huge –8, Gargantuan –12, Colossal –16.
Being Observed If people are observing you using any of their senses (but typically sight), you can’t use Stealth. Against most creatures, finding cover or concealment allows you to use Stealth. If your observers are momentarily distracted (such as by a Bluff check), you can attempt to use Stealth. While the others turn their attention from you, you can attempt a Stealth check if you can get to an unobserved place of some kind. This check, however, is made at a –10 penalty because you have to move fast.
Magic If you are invisible, you gain a +40 bonus on Stealth checks if you are immobile, or a +20 bonus on Stealth checks if you’re moving.
Feats If you have the Stealthy feat, you get a bonus on Stealth checks (see Feats).

This calculator does not use unchained rules.