A simple unit converter. Parses an input expression (with units), and prints the computed result. Available operators are +-*/, with familiar precedence and association.
Units (optionally followed by powers) are acceptable primary values, and are grouped such that 1 kg m/s2 evaluates to the same result as 1N. Most standard SI units are implemented, along with some imperial and other common units.
converter [-i | "expression"]
A provided string will be parsed and evaluated, while -i evaluates expressions on loop.