Blockpad handles units of measure the way engineers need, including conversions and cancellations inside equations.
Assign a unit by typing the unit after the number - that's it.
Formulas convert, cancel, and multiply units when they should, and Blockpad will show an error when the units don't match up.
Convert a value by typing 'to new unit' after the number.
Blockpad supports foot - inch units naturally, with fractions and all.