The Template:Convert/help for unit "help" displays helpful information about the measurement-converter, Template:Convert. Format: {{convert|7|m|ft}}, but there are many options:
abbr=on, abbr=off, abbr=in, abbr=out, abbr=~ (symbol), abbr=values (no unit names)
lk=on, lk=in, lk=out (for wikilinks) Round result: |1 or |3, or |-2, etc.