A metering device suitable for use in a dry powder inhaler comprises a housing defining a reservoir. The reservoir contains a powder. A rotatable auger, having a first and second end, has one or more flutes extending between the ends. The first end of the auger communicates with the reservoir. A dosing member, defining a dosing recess having a desired volume, is positionable adjacent said second end of said auger. Rotation of said auger causes the powder to be transferred through the flutes and into the dosing recess to fill the recess volume with a specific dose of powder.