Mexican units of measurement
{{Short description|Units of measurement used in Mexico}}
A number of units of measurement were used in Mexico to measure length, mass, area, capacity, etc. The Metric system was optional from 1857, and has been compulsory since 1896.{{Cite book|title = International Critical Tables of Numerical Data, Physics, Chemistry and Technology|last = Washburn|first = E.W.|publisher = McGraw-Hil Book Company, Inc|year = 1926|location = New York|volume = 1|pages = 9 | url=https://books.google.com/books?id=zkErAAAAYAAJ&q=international+critical+tables+1926&pg=PA9 | access-date=8 February 2015}}{{Cite book|title = Encyclopaedia of Scientific Units, Weights and Measures. Their SI Equivalences and Origins.|url = https://archive.org/details/encyclopaediasci00card_043|url-access = limited|last = Cardarelli |first = F.|publisher = Springer|year = 2003|isbn = 978-1-4471-1122-1|location = London|pages = [https://archive.org/details/encyclopaediasci00card_043/page/n153 7]}}
System before metric system
Length
A number of units were used. One vara (lit. "pole", "yard") was equal to 0.838 m (32.99 inches) as it was legally defined also use inches and feet. Some other units and legal equivalents are given below:
1 linea (lit. "line") = {{frac|1|432}} vara
1 pulgada (lit. "thumbful", "inch") = {{frac|1|36}} vara
1 pie (lit. "foot") = {{frac|1|3}} vara
1 legua (lit. "league") = 5000 varas.
Mass
A number of units were used. One libra (lit. "pound") was equal to {{val|0.46024634}} kg as it was legally defined. Some other units and legal equivalents are given below:
1 tomin = {{frac|1|768}} libra
1 adarme = {{frac|1|256}} libra
1 ochava ("eighth") = {{frac|1|128}} libra
1 onza ("ounce") = {{frac|1|16}} libra
1 arroba = 25 libras
1 quintal ("hundredweight") = 100 libras
Area
Capacity
Two systems, dry and liquid, were used.
=Dry=
=Liquid=
Several units were used. Some units and legal equivalents are given below:
1 cuartillo (for wine) = {{val|0.456264}} L
1 cuartillo (for oil) = {{val|0.506162}} L
One frasco was equal to {{frac|2|1|2}} quarts, and one baril was equal to 20 gallons, with local variations.{{Cite book|title = Weights Measures and Money of All Nations|url = https://archive.org/details/weightsmeasuresm00clarrich|last = Clarke|first = F.W.|publisher = D. Appleton & Company |year = 1891|location = New York|pages = [https://archive.org/details/weightsmeasuresm00clarrich/page/n54 51]}}