The Tavern

Does exist an in-game way to check the current encumbrance rating?
It's kind of impossible to calculate everything, with shield ect. I usually remove stuff and check failures, but now I am with cursed stuff.

Thanks

Yeah it's right there in the inventory, just hit i and pick your armour slot.

As for calculating by hand, that's generally not worthwhile. If you give us a char dump, which is given by pressing #, most people here could give you a rough estimate of how hard an X level spell will be.