Abstract: A method and apparatus for measuring and displaying the remaining doses in a metered-dose inhaler is made up of a housing having a weigh scale and load cell, a display screen in hinged relation to the housing, and a calculator associated with the load cell for subtracting the measured weight of the inhaler, after one or more doses have been expelled from the inhaler, from its original gross weight to determine the net weight of the contents of the inhaler, and dividing the net weight of the contents by the per dose weight followed by displaying the resultant number of doses remaining in the inhaler on the display screen.