Weight

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v50.15 · v0.47.05 This article is about the current version of DF. Note that some content may still need to be updated. More Info · V

Weight, or sometimes more correctly termed mass, is an item property, and is measured in the unit Γ, also sometimes known as urists, or more commonly as the kilogram, its equivalent real-life unit.

Weight is largely used by the game to determine how fast someone or something should move, due to encumbrance effects and carry weight restrictions; to calculate damage, since object mass factors into impact momentum; and to some extent to make temperature calculations, as mass factors into heat capacity. Note that, for DF, weight and mass are currently indistinguishable because, as it stands, DF gravity is uniform both across the whole universe and from world to world and buoyancy isn't implemented.

Weight is displayed as a quantity associated with an item. Weight calculation is not entirely straightforward, since each item category — or sometimes even individual items — have their own formula for determining weight.

In adventure mode (where weight is referred to as "burden"), carrying too much weight in a character's inventory will cause them to move slower the more they carry beyond their limits. When this happens, an icon appears above the inventory icon. Movement speed is reduced based on how much you exceed your carrying capacity, it will never reach zero however, even if you are carrying hundreds of units above your carrying capacity. Characters can carry more the higher their strength attribute is. Naturally stronger, larger characters (such as the elephant man) are able to carry more.

Weight Calculation

The general form for calculating weight in DF is to take the material density (as found in the raws) multiplied by the item's volume.

Weight (in Γ) = Density (in kg/m³) * Volume (in cm³) / 1,000,000 (cm³/m³)

Internally, all custom volume/capacity numbers are rounded down to the nearest multiple of 10 - thus, if you define a tool with [SIZE:15], it will actually behave as if you had specified [SIZE:10].

An item's volume is also used to determine workshop clutter as well as how many items can fit into a container.

Assorted item weights

Weight displayed in-game is rounded down to a whole number.

Item	Weight in Γ(kg)	Notes
Iron anvil	78.5000	Same as a steel anvil.
Aluminum bar	16.2000	Least dense normal metal.
Steel bar	47.1000	Same as an iron or pig iron bar.
Platinum bar	128.4000	Most dense metal.
1 Copper coin	0.0893	Weight per coin varies with stack size, see Size for details.
500 Copper coins	2.7683	This is 0.0055366 per coin, but that varies with stack size.
500 Silver coins	3.2519	This is 0.0065038 per coin, but that varies with stack size.
500 Gold coins	5.9892	This is 0.0119784 per coin, but that varies with stack size.
Feather (wood) barrel	2.0000	Least dense wood, found only in good biomes.
Willow barrel	7.8000	Least dense common wood, found near water in many biomes.
Tunnel tube barrel	10.0000	Least dense cavern wood, found only in lower caverns.
Tower cap barrel	12.0000	Same as a barrel of acacia, ash, fungiwood, goblin-cap, mahogany, pear, or spore wood.
Blood thorn barrel	25.0000	Most dense wood, found only in lowest caverns.
Jet block	7.9200	Least dense non-economic stone.
Shale block	13.5000
Cinnabar block	48.6000	Most dense non-economic stone.
Sheep cheese	1.2000	All cheeses seem to use the default density of 1200 kg/m3.
Willow large pot	1.9500	Least dense common wood, found near water in many biomes.
Tower cap large pot	3.0000	Same as a large pot of acacia, ash, fungiwood, goblin-cap, mahogany, pear, or spore wood.
Blood thorn large pot	6.2500	Most dense wood, found only in lowest caverns.
Jet large pot	6.6000	Least dense non-economic stone.
Earthenware large pot	6.8000	Must be glazed to hold liquids (or maybe any food).
Stoneware large pot	10.0000	Does not need glazing.
Shale large pot	11.2500
Porcelain large pot	12.0150	Not an unlimited resource like other ceramics.
Glass large pot	13.0000	All three types of glass have the same density.
Cinnabar large pot	40.5000	Most dense non-economic stone.
Feather log	5.0000	Least dense wood, found only in good biomes.
Willow log	19.5000	Least dense common wood, found near water in many biomes.
Tunnel tube log	25.0000	Least dense cavern wood, found only in lower caverns.
Tower cap log	30.0000	Same as a log of acacia, ash, fungiwood, goblin-cap, mahogany, pear, or spore wood.
Blood thorn log	62.5000	Most dense wood, found only in lowest caverns.
Jet stone	132.0000	Least dense non-economic stone.
Shale stone	225.0000
Cinnabar stone	810.0000	Most dense non-economic stone.

See also

• Density
• Size

"Weight" in other Languages Dwarven: âl Elven: eba Goblin: deslo Human: ketas