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This paper presents the design and simulation of a MEMS based clamped capacitive pressure sensor for blood pressure measurement. Normally, Blood pressure for human beings varies in the range of 0.1–0.14 MPa. The operating range of this sensor design, modified according to the dimensions, is between 0 and 0.16 MPa. The diaphragm deflects on application of pressure which triggers a change in the capacitance between diaphragm and bottom electrode. The plates are separated by a dielectric medium (). The change in capacitance, capacitive sensitivity and diaphragm deflection are observed for every design model to determine its performance. To improve the sensor performance, parameters like separation gap and diaphragm thickness are varied. The length and width of square diaphragm and overlapping area (A) are constant for all the designs. Small deflection theory (), pull-in voltage …