The present invention provides a fast, efficient, precise method and apparatus for compounding solutions for use in hyperalimentation therapy. The apparatus includes a controller for entering the volume and specific gravity of the solution to be compounded.A load cell monitors the weight of the solutions that have been transferred to a collection vessel and in connection with the controller thereby maintains the precise amount of each therein. The controller also surveys various process conditions and warns of any failure of those conditions. Peristaltic pumps are used for the delivery of the compounding solution to maintain the solutions in a sterile condition.