.. User Manual, LibreCAD v2.2.0

.. Default include
.. include:: /inclFiles/notice.rst


.. _measurements: 

Systems of Measurement
======================

LibreCAD supports a large number of measurement systems/units:

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    "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.