According to an embodiment the present invention, a printing apparatus detects a distance between a printhead and a print medium using a sensor while using a print medium for sensor calibration and changing a height from a print position to a carriage, stores first distance information indicating a relationship between the height and a signal representing a result of detecting the distance for each of heights in a memory, obtains second distance information indicating a relationship between the height and the signal representing the result of detecting the distance for each of the heights while using a predetermined print medium and changing the height, compares the first and second distance information, and corrects the first distance information stored in the memory, based on a result of the comparison.