Unit To Unit 2.1.1

the author of this app says:

This is a configurable unit conversion calculator. It allows the user to convert from one unit system to another for most common measurements like temperature, speed, length, area, mass, density, light, time, volume, pressure, flow, power, force, angle, current, acceleration, frequency, angular velocity, digital resolution, data, astronomical units and torque. It supports configuration up to the desired level of decimal point precision, and it also supports scientific notation.