Beginner- Bevel Question Hi Blender Community, 

I have a noob question. I've noticed that when I bevel a cube, the bevel turned out to be evenly distributed. However, when beveling a rectangular box, I am noticing the bevel is scaling in proportion to the long and short length of the box.

I figured that if I then try and rotate them locally, it might do the trick. But I've come to realize that unless there is a menu that I can punch in the numbers directly, I wouldn't be able to know for sure if the angle is exact. 

If you all can help shed some light on a method that worked for you, please let me know! 

I'll attach a photo so that the problem is easier to understand. 

Thank you!
You change the scale of the object, right? It will make the whole object being transformed. While bevel, as an operator, only work in mesh edit mode. It wont consider the scale of the object. (Ctrl+A can apply the scale) 



And almost every operator(Redo Last operator) will give you a floating dock to tweak your option in the left-bottom corner. If it doesn't appeared, try hitting F9 (F6 for Blender 2.79 and below).



And if you want more control over the bevel, try out bevel modifier:



You can custom a lot of effect with edge weight, one should always consider using modifier unless the task is not complicate and don't need further modification.