Old School RuneScape Wiki

Decanting is the method in which a player combines partially full potions of the same kind to produce one full potion and one partially empty potion. For example, decanting a potion containing 3 doses and another containing 2 doses yields one full potion (4 doses) and one partially full potion (1 dose).

Potion A Potion B Results-
1 dose 1 dose 2 dose + Empty vial
1 dose 2 dose 3 dose + Vial.png
1 dose 3 dose 4 dose + Vial.png
2 dose 2 dose 4 dose + Vial.png
2 dose 3 dose 4 dose + Overload (1).png
3 dose 3 dose 4 dose + 2 dose
4 dose Empty vial 2 dose + 2 dose
2 dose Empty vial Overload (1).png + Overload (1).png

Occasionally it is required for potions to be in 2- or 3-doses, rather than 4:

  • Barbarian mix potions can only be made from 2-dose potions.
  • Using 2-dose super combat potions, rather than 4-dose, can reduce unnecessary monetary loss in the Wilderness.

Players can create 2-dose potions either by decanting two 1-dose potions, decanting two 3-dose potions, or decanting a 4-dose potion with an empty vial.

Decanting NPCs

There are two NPCs, Zahur in Nardah as well as Bob Barter in the Grand Exchange, who can decant potions for players for free, only charging them if they did not have enough vials while decanting into smaller doses. The player may decant any potions (noted or unnoted) into potions with any doses.

Although Bob Barter is available in free-to-play worlds, his decanting option is only available for members.


  • Previously, NPCs could only decant potions into 4-dose potions. The option to select other dose sets was added in an update on 27 September 2018.