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  2. Mud weight - Wikipedia

    en.wikipedia.org/wiki/Mud_weight

    In the oil industry, mud weight is the density of the drilling fluid and is normally measured in pounds per gallon (lb/gal) (ppg) or pound cubic feet (pcf) . [1] In the field it is measured using a mud scale or mud balance. Mud can weigh up to 22 or 23 ppg. A gallon of water typically weighs 8.33 pounds (or 7.48 ppg).

  3. Comparison of the imperial and US customary measurement ...

    en.wikipedia.org/wiki/Comparison_of_the_imperial...

    Both the imperial and US fluid gallon are divided into 4 quarts, 8 pints or 32 gills. [d] However, whereas the US gill is divided into four US fluid ounces, the imperial gill is divided into five imperial fluid ounces. Thus, while the imperial fluid ounce is 3.924% smaller than the US fluid ounce, the imperial gallon, quart, pint and gill are ...

  4. Dry gallon - Wikipedia

    en.wikipedia.org/wiki/Dry_gallon

    The dry gallon's implicit value in the US system was originally one-eighth of the Winchester bushel, which was a cylindrical measure of 18.5 inches (469.9 mm) in diameter and 8 inches (203.2 mm) in depth, making it an irrational number of cubic inches; its value to seven significant digits was 268.8025 cubic inches (4.404884 litres), from an ...

  5. Fluid ounce - Wikipedia

    en.wikipedia.org/wiki/Fluid_ounce

    The US fluid ounce is based on the US gallon, which in turn is based on the wine gallon of 231 cubic inches that was used in the United Kingdom prior to 1824. With the adoption of the international inch , the US fluid ounce became 1 ⁄ 128 gal × 231 in 3 /gal × (2.54 cm/in) 3 = 29.573 529 5625 mL exactly, or about 4.08% larger than the ...

  6. Imperial units - Wikipedia

    en.wikipedia.org/wiki/Imperial_units

    The former Weights and Measures office in Seven Sisters, London (590 Seven Sisters Road). The imperial system of units, imperial system or imperial units (also known as British Imperial [1] or Exchequer Standards of 1826) is the system of units first defined in the British Weights and Measures Act 1824 and continued to be developed through a series of Weights and Measures Acts and amendments.

  7. Gallon - Wikipedia

    en.wikipedia.org/wiki/Gallon

    The gallon is a unit of volume in British imperial units and United States customary units.. The imperial gallon (imp gal) is defined as 4.546 09 litres, and is or was used in the United Kingdom and its former colonies, including Ireland, Canada, Australia, New Zealand, India, South Africa, Malaysia and some Caribbean countries, while the US gallon (US gal) is defined as 231 cubic inches (3. ...

  8. Bushel - Wikipedia

    en.wikipedia.org/wiki/Bushel

    The modern American or US bushel is rounded to exactly 2150.42 cubic inches, a difference of less than one part per ten million. [ 5 ] In English use, a bushel was a round willow basket with fixed dimensions, and its inside measurements were as follows - base diameter 12 inches, top diameter 18 inches, height 12 inches - thus giving a volume of ...

  9. Firkin (unit) - Wikipedia

    en.wikipedia.org/wiki/Firkin_(unit)

    A firkin was an American unit of dry measure. 1 firkin = 9 US gallons = 34 litres [ 3 ] American naturalist John Burroughs (1837–1921) in his boyhood memoir described a firkin as weighing 100 pounds when loaded with salted butter.