Unit Conversion does not support converting value directly
Unit Conversion API does not support converting the value from one unit to another directly, e.g., converting 5ft to m. It supports retrieving conversion factors for two units, but leaves the calculation implementation to the user.
For example there are three attributes “fromCRS”, “toCRS”, “Points” in CRS conversion so that the user can make one call to convert the coordinate from NAD27 to WGS84. To be comparable, it would make more sense to have a similar API for unit conversion including “fromUnit”, “toUnit”, “value” so that the user can get the converted result in one call.
cc: @debasisc