Every item has a weight. Carry too much and you become burdened, stressed, strained, overtaxed or overloaded. If you are anything but unburdened, your movements become slower. Fighting while burdened is not advisable. The following table lists the weights of a few common items and a couple of monsters in order of their weight:
|100 gold pieces||1|
|dragon scale mail||40|
Monsters have no specific weight while alive (they are instead classified by size), but their corpses do.
Using a bag of holding reduces the weight of the items it contains, unless it is cursed, which makes the items twice as heavy as they are. An uncursed bag of holding effectively reduces the weight of its contents by half and a blessed one by three quarters.