A measurement apparatus includes a measurement unit, a light emitter configured to emit light onto a test site of a subject, a light receiver configured to receive reflected light from the test site, a pressure detector configured to detect pressure on the measurement unit, and a calculator configured to calculate a concentration of a predetermined component in blood of the subject contacting the measurement unit based on output of the light receiver when the pressure is within a first range and on output of the light receiver when the pressure is within a second range.
