Imperial and Metric Measurements

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There is a unit of measure in the imperial system (on which the U.S. customary system is based) smaller than an inch. It's called a thou, and it is one/one-thousandth of an inch.

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Key Facts In This Video

  1. Three barleycorns equal one inch. 00:34

  2. One nautical mile equals 6,080 feet, which is much different from a standard mile. 01:06

  3. A line is the same length as a poppyseed, and four poppyseeds equal one barleycorn. 02:28

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Key Facts In This Video

  1. A "dash" of an ingredient in cooking is exactly 1/8 of a teaspoon. 00:37

  2. A "hogshead" is a unit of measurement for wine, which equals 63 gallons. A "butt" equals two hogsheads. 01:55

  3. An "oxgang" is a unit of measurement used to measure an area of land approximately equivalent to 15 acres. 06:30

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