From the developer: "Unc is a 70-function RPN calculator with true knowledge of units. This program contains over 130 built-in units, and users can define new ones. The calculator performs powers, roots, logarithms, and trig hyperbolic functions, and displays numbers in conventional or scientific notation. Unc is also a full-featured programmer's calculator, supporting arithmetic and logical operations on integers up to 128 bits wide, in decimal, hex, binary, and octal."
||Free to try