Systems of Measurement

LibreCAD supports a large number of measurement systems/units:

Unit	Abbr.	System	Equivalences	Uses (*)
Inch	in	Imperial	3 barleycorns	Widely used in the United States, Canada, and the United Kingdom.
Foot	ft	Imperial	Size 46 (EU) shoe size	Still widely used in the United States, Canada, and the United Kingdom.
Mile	mi	Imperial	0.2756 of a Dutch mile	Used way too often in other than a ‘’international mile’’.
Millimeter	mm	SI	More than 25 in an in	Vanilli’s favorite
Centimeter	cm	SI
Meter	m	SI	nm
Kilometer	km	SI		Sigh, SI units are not funny…
Microinch	µin	Imperial
Mil	mil	Imperial	1/1000 of an inch	Replaced with ‘’thou’’ (but not ‘’you’’).
Yard	yd	imperial	3 foots	Measure ale!
Angstrom	å		≈ one ten-billionth of a meter	Zoom to a parsec - I dare you.
Nanometer	nm	SI	1 E−9 m	the UoM formerly known as the ‘’millimicrometre’’ and ‘’mµ’’.
Micron	µm	SI		Really is a ‘’micrometer’’, but not to be confused with a ‘’micrometer screw gauge’’.
Decimeter	dm	SI	0.1 meter
Decameter	dam	SI	10 meters	‘’dam’’, don’t be juvenile.
Hectometer	hm	SI	100 meters	Should be funny, but why?
Gigameter	Gm	SI	1,000,000,000 meters	That’s one beeellion meters.
Astro	au, ua or AU	astronomical unit		also a ‘’a South Korean boy band’’.
Lightyear	ly	astronomical unit	63241 au	First name ‘’Buzz’’.
Parsecs	pc	astronomical unit	≈ 206264.806247096 astronomical units	er, big. What else can one say? Made popular by James T.

*: Obtained from Wikipedia and Wiktionary and wildly interpreted by the author of this page.