I haven't really tried to figure out maxes ever, but since I'm doing the 5x5, I'll use those numbers.
Bench - 215
Dead lift - 325
Squat - 185
Why is my squat so low?

Also, by the following day, my arms feel pretty good after benching, my chest is a little sore but by day 2 it's great. My back feels tight-but-awesome the day after dead lifting, and my posture is excellent. I struggle to walk for 2-3 days after squatting usually. It's in my thighs; they get super tight and don't want to move to allow me to walk and such. Any ideas? It's not terribly painful, just an annoyance, really.