This paper describes the implementation of electronic scientific calculator using Arduino. The mathematical process for scientific calculation processes are based on the digital electronic technology. The calculator takes input from a user in real time via a keypad and displays output on a LCD display module. The control, arithmetic algorithm and calculation functions are performed using a Arduino Mega 2560. The prototype of the system is configured and the simulation results for basic mathematical functions and some scientific functions of calculator are expressed with the help of Proteus simulation software. And then the experimental results are tested with the constructed calculator circuit. Ma Hnin Yu Myaing | Ma Naing "Arduino Based Scientific Calculator" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd26395.pdf