A quantity converting and indicating apparatus for use in automatic remote systems for inspecting consumed amounts of gas, city water, electric power or the like, by which a detected value in the decimal system displayed on such a counter as a gas meter is converted to a binary system value convenient for transmission by a channel such as a telephone circuit. The apparatus is provided with plural cams (2) cooperative with a figure wheel (4) of the counter for converting the detected value to the binary system value, plural vibrators (6a) placed facing each cam and fixed each at one end, flexible vibrator controlling members (5) placed adjacent to the concaves and convexes (2a, 2b) of each cam and facing the respective vibrators at their other ends for controlling the vibrators, means (10) for activating the vibrators, and means (7, 8) for converting the vibration to an A.C. signal having a frequency in a band adopted for transmission by means such as a telephone circuit.