A system of stones is how encumbrance will be tracked. This system includes a rough estimate of weight and size when determining encumbrance. This first table indicates the number of stones per weight class. Each category lessens character movement by 1/4 of his normal movement rate, so a medium loaded character can only move at 1/2 his normal movement rate (6" if he normally moves at 12").
Groups of items and individual items have stones associated with them. Below are some common items you might be wearing, carrying, or stowing.
Armor, light = 1 stone
Armor, medium = 3 stones
Armor, heavy = 5 stones
Quiver = 1 stone
Shield = 1 stone
Weapon, normal = 1 stone
Weapon, light = miscellaneous item
Ammunition = miscellaneous item per 20
Weapon, stowed up to 5 = 1 stone
Heavy items = 1 stone per 15 lbs.
Coins and gems = 1 stone per 150
Miscellaneous items = 1 stone per 5 bundles
If you are not carrying an item or wearing it for immediate use, it must be stored inside a container. Each container has a storing capacity (number of stones) associated with it. Containers are weightless when empty. You should have a separate sheet of paper to track what item is in which container.
Belt pouch = 1 stone
Bag or sack, small = 2 stones
Satchel = 2 stones
Bag or sack, large = 3 stones
Backpack, small = 3 stones
Backpack, large = 5 stones
If you need to drop something from your person quickly, it must be done by container. That means everything listed in that container is no longer on your person. You cannot drop individual items unless you are carrying them for immediate use.
This system of encumbrance is based on Justin Alexander’s work.