eCalc is a free Windows calculator with basic and scientific functions. The calculator is designed with a high level of aesthetics, including large buttons and an easy to read display. The calculator operates with a frameless border and stays open above your other programs - making it an ideal side companion tool. Notable features of this calculator include memory functions, percent, sqrt(x), sqr(x), inv(x), and an engineering exponent key (EEX). The calculator includes a link to eCalcs online scientific calculator which supports more advanced features such as unit conversion, trigonometric functions, equation solving, and complex number math.

The license of this software is Freeware, you can free download and free use this calculator software.