A computer as an input adjustment apparatus includes a memory. This memory stores an input adjustment program. The computer is connected with a touch pad. When a user touches the touch pad with his/her finger, the computer is provided with touch coordinate data on a touched portion and a value according to an area of the touched portion. Based on the coordinate data and the value according to the touch area, the computer calculates a scale factor of a range in which the user can actually perform an operation in such a manner as to conform to a whole operating range of the touch pad. Then, the computer multiplies by the scale factor a difference of coordinates indicated by the coordinate data (current touch coordinates) from a reference position, and input the resulting value as input data into an electronic device.