getcalc.com's digital numbers calculators and converters to study or execute basic to complex arithmetic (addition, subtraction, multiplication and division) operations and conversions between binary, hex, octal and decimal number system. These online tools also include RGB, CMYK and HEX color code conversion, DPI to PPC conversion, PIXEL, POINT and EM conversion, 1’s complement, 2’s complement, gray code, bitwise operations, EPOCH timestamp conversion, random number, random color, data download time and keyboard key-code and much more.