Apparatus and a calibration method for measurement of blood pressure are used to determine personal PIPs for a given subject and to store the personal PIPs for future personal use in blood pressure measurement in the subject. The apparatus comprises at least one button communicating with a MPU unit for entering information used to determine the personal PIPs of the subject. The method comprises the steps of obtaining information required to determining the PIPs of a subject, determining the personal PIPs of the subject, and storing the personal PIPs of the subject for future personal use for the subject.
