According to one embodiment, an apparatus includes a sensing apparatus and a calibration device. The sensing apparatus includes: a calculator calculating first information on a position of the sensing apparatus. The calibration device includes: a measuring device intermittently measuring first biological information； a receiver receiving the first information； a calculator calculating second information on a position of the calibration device； a determination unit determining whether or not the sensing apparatus and the calibration device are worn on an identical biological site based on the first and second information； and a calculator calibrating the pulse wave based on the first biological information and calculating second biological information based on the calibrated pulse wave.
