Weight

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v50.12 · 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.

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	78.50	Same as a steel anvil.
Aluminum bar	16.20	Least dense normal metal.
Steel bar	47.10	Same as an iron or pig iron bar.
Platinum bar	128.40	Most dense metal.
Feather (wood) barrel	2.00	Least dense wood, found only in good biomes.
Willow barrel	7.80	Least dense common wood, found near water in many biomes.
Tunnel tube barrel	10.00	Least dense cavern wood, found only in lower caverns.
Tower cap barrel	12.00	Same as a bed of acacia, ash, fungiwood, goblin-cap, mahogany, pear, or spore wood.
Blood thorn barrel	25.00	Most dense wood, found only in lowest caverns.
Jet block	7.92	Least dense non-economic stone.
Shale block	13.50
Cinnabar block	48.60	Most dense non-economic stone.
Sheep cheese	1.20	All cheeses seem to use the default density of 1200 kg/m3.
Feather log	5.00	Least dense wood, found only in good biomes.
Willow log	19.50	Least dense common wood, found near water in many biomes.
Tunnel tube log	25.00	Least dense cavern wood, found only in lower caverns.
Tower cap log	30.00	Same as a bed of acacia, ash, fungiwood, goblin-cap, mahogany, pear, or spore wood.
Blood thorn log	62.50	Most dense wood, found only in lowest caverns.
Jet stone	132.00	Least dense non-economic stone.
Shale stone	225.00
Cinnabar stone	810.00	Most dense non-economic stone.

See also

• Size

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