Convert from button measure to point [Adobe]

Unit Definition (button measure)
The button measure is a unit of distance equal to 1/40 inch (0.635 millimeter), used to measure the thickness of buttons.

Unit Definition (point [Adobe])
A point is a unit of measure in typography (Abbreviated as "pt"). There are various sorts of points, used in particular locations and times: * Fournier point: the first definition of the printer's point, by Pierre Fournier. It was 0.34882 millimetres, which was 1/12 of a cicero.