Note

This manual is for LibreCAD’s stable release version 2.2.0.

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.