An apparatus for estimating bio-information, the apparatus comprising: a pulse wave sensor (110, 510, 710) configured to measure a pulse wave signal from an object; a force sensor (120, 520, 720) configured to measure a first force exerted between the object and the pulse wave sensor (110, 510, 710); and a processor (130, 200, 530, 730, 800) configured to: obtain sensor position information of the pulse wave sensor (110, 510, 710) with respect to the object, based on the object being in contact with the pulse wave sensor (110, 510, 710); convert the first force into a second force by converting the first force into a third force, based on a distance between a predetermined reference point of the object and the obtained sensor position information, and converting the third force into the second force based on structure information of the object; obtain a first correction value, based on the distance between the reference point and the sensor position; obtain a second correction value, based on a distance between the reference point and a reference position; convert the first force into the third force, based on the first correction value and the second correction value; and estimate the bio-information, based on the pulse wave signal and the second force. a pulse wave sensor (110, 510, 710) configured to measure a pulse wave signal from an object; a force sensor (120, 520, 720) configured to measure a first force exerted between the object and the pulse wave sensor (110, 510, 710); and a processor (130, 200, 530, 730, 800) configured to: obtain sensor position information of the pulse wave sensor (110, 510, 710) with respect to the object, based on the object being in contact with the pulse wave sensor (110, 510, 710); convert the first force into a second force by converting the first force into a third force, based on a distance between a predetermined reference point of the object and the obtained sensor position information, and converting the third force into the second force based on structure information of the object; obtain a first correction value, based on the distance between the reference point and the sensor position; obtain a second correction value, based on a distance between the reference point and a reference position; convert the first force into the third force, based on the first correction value and the second correction value; and estimate the bio-information, based on the pulse wave signal and the second force. obtain sensor position information of the pulse wave sensor (110, 510, 710) with respect to the object, based on the object being in contact with the pulse wave sensor (110, 510, 710); convert the first force into a second force by converting the first force into a third force, based on a distance between a predetermined reference point of the object and the obtained sensor position information, and converting the third force into the second force based on structure information of the object; obtain a first correction value, based on the distance between the reference point and the sensor position; obtain a second correction value, based on a distance between the reference point and a reference position; convert the first force into the third force, based on the first correction value and the second correction value; and estimate the bio-information, based on the pulse wave signal and the second force.