They are slightly tender and the stem can be wiggled a bit. Beyond that, I don't know how to objectively quantify it, but if you know what a perfectly ripe avoc

They are slightly tender and the stem can be wiggled a bit. Beyond that, I don't know how to objectively quantify it, but if you know what a perfectly ripe avocado feels like, it's about the same or just a little bit less. They might ripen in the fridge another half-day's worth. And if you don't know that, trial and error will quickly converge to an optimal solution within a few tries.