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This article is about an older version of DF.

Soap is a particularly useful type of bar used for personal cleaning, which increases happiness ("recently took a soapy bath") and lowers the chances of an infection in case they are wounded, and for cleaning wounds in hospitals, preventing infections from developing. It is thus a vital commodity in dwarven health care, and one not traded in caravans: you're going to have to make some soap yourself. Since soap is considered to be a bar, it can be used to make constructions and workshops.

Unlike most other items, bars of soap have a "durability" level which allows jobs to partially consume them - each bar starts with 150 units, and cleaning jobs consume varying quantities of soap before ultimately using it up.


Soap is made of two components, lye and fat (either tallow or oil), and requires a dedicated workshop, the soap maker's workshop. It has a somewhat complicated production process; lye must be produced at an ashery from ash, which in turn must be created at a wood furnace from wood logs that must first be cut down. Tallow is rendered from the fat from butchered animals at a kitchen, requiring either livestock or hunting activities, while oil must be pressed from seeds or rock nuts at a screw press, which first requires gathering or growing crops and then processing them at the farmer's workshop. One unit of tallow or oil plus one of lye creates a single bar of finished soap.

Soapmaking procedure
Chop wood Butcher an animal Mill seeds with a quern or millstone Press oil from olives (fruit) in a screw press
Make ash in a wood furnace Render fat in a kitchen Press oil from seed paste in a screw press
Make lye at an ashery Tallow Oil
Lye Tallow or Oil
Make soap at a soap maker's workshop


Dwarves do not require soap to clean contaminants such as mud and blood from themselves - if necessary, they will use murky pools, artificial pools of water, brooks, or a well. However, using soap will often generate the happy thought "recently took a soapy bath". It is possible to construct bath-houses (rooms containing pools of water, a soap stockpile, and perhaps a few nice statues) so dwarves living deep underground need not venture to dangerous cave pools or surface brooks to clean off a little mud or some bloodstains. For cleaning wounds and preventing infection after surgery, however, hospitals should be kept stocked with a small amount of soap. Soap will get used up as dwarves wash themselves, and dirtier dwarves consume soap more quickly.

Dwarves have an internal "dirtiness" level, which slowly builds up over time, gets lowered when they have a bath, and lowered further when they have a soapy bath. This "dirtiness" value is connected to the chance of getting an infection if the dwarf is injured, making soap useful as a preventative as well as treatment.

Soap is stored in bar/block stockpiles with the "soap" option enabled.

A convenient way to keep an emergency stockpile of soap is to use it as a building material for workshops or constructions such as walls. When/if you need more soap, you can deconstruct and get the soap bars back. Since soap in a hospital is reserved for hospital use, this is especially useful in case you start to produce soap before setting up a hospital.

Handmade soaps
"Soap" in other Languages Books-aj.svg aj ashton 01.svg
Dwarven: uben
Elven: dathe
Goblin: snubez
Human: kamven

More: GemsMetalsStones
BloodBoneBrainCartilageCheeseChitinEggFatFeatherHair (WoolYarn) • HoofHornIchorLeatherMilkNailNervous tissueParchmentPearlScaleShellSilkSkinSpitSweatTallowTearsToothWax
Fiber (PaperSlurry) • FlowerFruitLeafOil • Plant powders (DyeFlour) • Seed (Press cake) • Wood
AmberAshCoralFilthFuelGlassGrimeIceLyeMagmaMudPearlashPotashSaltUnknown substanceVomitWater
See also: Material science
Beekeeping · Farming · Fishing · Gathering · Meat · Poultry · Stone · Wood
Alcohol · Armor · Arms · Ceramic · Extract · Finished goods · Fuel · Furniture · Gem · Glass · Metal · Paper · Soap · Textile