Abstract-Out of control blood pressure whether it is low or high can be dangerous and major cause of heart disease. The people suffering from blood pressure problems are increasing day by day. The main objective of this paper is to make a wrist band which can monitor the blood pressure of our body at any time. The approach is to make it consume low power for its operation. Technique applied for doing same is capacitance scaling using Field Programmable gate Array using Xilinx software. The power consumption at frequency 0.2GHz, 1GHz, 2GHz, 20GHz and 200GHz is calculated for Low PowerVirtex6 FPGA.