The program has built in unit and general dimension calculation capabilities.
Recent changes:
Improved compatibility with Gnumeric.
Doubled the size of the function palette (that is the sub-function menu).

Dimensions Computing has been developed for computing dimensions (M, L, T, t) for an equation.
The application can be extremely useful when doing derivations of formulae, since keeping the dimensions of the LHS and the RHS in synchronization is essential. You 50e0806aeb onilgray