Abstract: The addition of two binary numbers is the most fundamental and widely used arithmetic operation. This operation is used in microprocessors, digital signal processors, data processing application specific integrated circuits and many more. There are many adders designed till now. ETA is one such efficient adder which speeds up binary addition. ETA is the Error Tolerant Adder which consumes less power and delay. Design of ETA is done using backend tool under real time simulation conditions. This paper compares the performance of the ETA in terms of accuracy, delay and power consumption with that of conventional adders.