The tun is an old English unit of wine cask volume, holding about 954 litres, almost a cubic metre. Originally, it was a genuine unit of volume and measured 256 gallons, which is the base for the name of the quarter of 64 corn gallons. Its later division into 210 imperial or 252 wine gallons was chosen to be evenly divisible by small integers, including seven: There is no one system of English units. ... A glass of red wine Wine display at the Mt Markey Winery This article is about the beverage. ... To help compare different orders of magnitudes this page lists volumes from at 10-1 m3 to 1 m3. ... The cubic metre (symbol m³) is the SI derived unit of volume. ... The gallon is a unit of volume used for measuring liquids (as well as dry matter). ... A quarter is: One of four equal parts of a single thing (sometimes referred to as a fourth in US English). ...
Originally, it was a genuine unit of volume and measured 256 gallons, which is the base for the name of the quarter of 64 corn gallons.
It is assumed that the tun once also was the base for English brewery casks, whose now largest measure, the hogshead, is of a similar magnitude as its wine equinominent (between 220 and 250 litres).
TEU is an abbreviation for "twenty-foot equivalent unit." One TEU represents the cargo capacity of a standard container 20 feet long, 8 feet wide, and (usually) a little over 8 feet high, or half the capacity of a similar container 40 feet long.
The thermal resistance of an insulating material, in thermal ohms, is the R-value (in SI units, equal to 0.1442 times the R-value in English units) divided by the thickness of the material, in meters.
Because these tuns were of standard size, more or less, the tun came to represent both a volume unit, indicating the capacity of a cask, and also a weight unit, indicating the weight of a cask when it was full.
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