GNU Units

The Units program converts quantities expressed in various scales to their equivalents in other scales. The units program can handle multiplicative scale changes as well as nonlinear conversions such as Fahrenheit to Celsius or wire gauge. Units comes with an annotated, extendable database defining over two thousand units.

The units are defined in an external data file. You can use the extensive data file that comes with this program, or you can provide your own data file to suit your needs. You can use the program interactively with prompts, or you can use it from the command line.

Units acts as a general calculator for units. You can add, subtract, multiply and divide units. You can raise units to integer powers and you can take roots of units. Operations can be grouped using parentheses.