Pulse Transit Time is the amount of time a particular volume of blood inside the artery takes to shift from one arterial site to another. In this method, PTT is calculated by an ECG-PPG combination. The PQRS waveform obtained by the ECG is compared with the Photoplethysmography waveform which is obtained by the apparatus fixed at the fore-fingertip. The time interval between the R-peak of the ECG waveform and the peak of photoplethysmography waveform gives the pulse transit time. The blood pressure and pulse transit time are highly related. An increase in blood Pressure makes an increase in blood velocity as a result of which blood takes very less time to move from one arterial location to another. A low blood pressure gives a high PTT value. An algorithm is developed to find the systolic and diastolic blood pressure from the PTT