It has been shown that the process of capsulation of granules of various materials by polymer capsule formers is the actual problem of modern chemical technology. The accessible method of determination of thickness of capsule on granules by means of marking and weighing of marked granules before and after the process of their capsulation has been proposed. The various expressions for calculation of this thickness with taking into account a form of capsulated granules have been proposed. A confidence of expressions by the method of comparison and coincidence of data calculated by them on thickness of capsules on marked granules has been checked.