Scottish units


Scottish or Scots units of measurement are the weights and measures peculiar to Scotland which were nominally replaced by English units in 1685 but continued to be used in unofficial contexts until at least the late 18th century. The system was based on the ell, stone, and :wikt:boll#Noun|boll and firlot. This official system coexisted with local variants, especially for the measurement of [|land area].
The system is said to have been introduced by David I of Scotland, although there are no surviving records until the 15th century when the system was already in normal use. Standard measures and weights were kept in each burgh, and these were periodically compared against one another at "assizes of measures", often during the early years of the reign of a new monarch. Nevertheless, there was considerable local variation in many of the units, and the units of dry measure steadily increased in size from 1400 to 1700.
The Scots units of length were technically replaced by the English system by an Act of the Parliament of Scotland in 1685, and the other units by the Treaty of Union with England in 1706. However many continued to be used locally during the 18th and 19th centuries. The introduction of the Imperial system by the Weights and Measures Act 1824 saw the end of any formal use in trade and commerce, although some informal use as customary units continued into the 20th century. "Scotch measure" or "Cunningham measure" was brought to parts of Ulster in Ireland by Ulster Scots settlers, and used into the mid-19th century.

Length

;Scottish inch: As in England. A fraudulent smaller inch of of an ell is also recorded.
;foot :12 inches.
;yard : 36 inches. Rarely used except with English units, although it appears in an Act of Parliament from 1432: "The king's officer, as is foresaid, shall have a horn, and each one a red wand of three-quarters of a yard at least."
;ell: The ell was the basic unit of length, equal to 37 inches. The "Barony ell" of 42 inches was used as the basis for land measurement in the Four Towns area near Lochmaben, Dumfriesshire.
;fall : 6 ells, or 222 inches. Identical to the Scots rod and raip.
;Scots mile : 320 falls or 5920 feet, but varied from place to place. Obsolete by the 19th century.

Area

A number of conflicting systems were used for area, sometimes bearing the same names in different regions, but working on different conversion rates. Because some of the systems were based on what land would produce, rather than the physical area, they are listed in their own section. Please see individual articles for more specific information. Because fertility varied widely, in many areas, production was considered a more practical measure.

Area by size

For information on the squared units, please see the appropriate articles in the [|length] section
Eastern Scotland:
In western Scotland, including Galloway:

Dry volume

Dry [|volume] measures were slightly different for various types of grain, but often bore the same name.
Weight equivalents of one boll are given in a trade dictionary of 1863 as follows:
Flour 140 pounds;
Peas or beans 280 pounds;
Oats 264 pounds;
Barley 320 pounds;
Oatmeal 140 pounds.

Fluid volume

Nipperkin was also used, but perhaps not part of this more formal set.
Standard Measures of Scotland before 1707:
NameScottish unitsUS customary unitsEnglish unitsMetric unitsNotes
gill of spirits cubic inches
gill of ale or beer0.014 gal0.053 L
mutchkin4 gills0.056 gal3 gills0.212 L
chopin4 mutchkins or 16 gills0.224 gal0.848 LDerived from the French measure chopine, from 13th century.
pint of spirits2 chopins cubic inches
pint of ale or beer2 chopins0.448 gal3 pints1.696 La.k.a. joug, tappit hen; 105 cubic inches;
gallon of wine or spirits8 pints231 cubic inches, 35 gills in a gallon of spirits
gallon of ale or beer8 pints3.584 gal3 gallons13.638 L846 cubic inches
hogshead of ale or beer54 gallons or 16 gallons
hogshead of wine or spirits63 gallons

Weight

Weight was measured according to "troy measure" and "tron measure", which were standardised in 1661. In the Troy system these often bore the same name as imperial measures.
Various local measures all existed, often using local weighing stones.
See also the weight meanings of the boll under the dry volume section, above.