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  2. 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.

  3. System of units of measurement - Wikipedia

    en.wikipedia.org/wiki/System_of_units_of_measurement

    A baby bottle that measures in three measurement systems—metric, imperial (UK), and US customary. Metric systems of units have evolved since the adoption of the first well-defined system in France in 1795. During this evolution the use of these systems has spread throughout the world, first to non-English-speaking countries, and then to ...

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

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

    Comparison of current imperial, US and metric volume measures; Notes: Approximate values are denoted with ≈; Exact values are denoted with ≡; Definitions are marked in bold; Unit name Imperial measures US fluid measures US dry measures Metric measures fluid ounces Imperial fluid ounce (fl oz) ≡ 1 imp fl oz. ≈ 0.960 759 940 40 US fl oz

  5. Imperial and US customary measurement systems - Wikipedia

    en.wikipedia.org/wiki/Imperial_and_US_customary...

    Countries using the metric, imperial and US customary systems as of 2019. In the 1960s a metrication program was initiated in most English-speaking countries, resulting in either the partial or total displacement of the imperial system or the US customary system of measure in those countries.

  6. Metrication - Wikipedia

    en.wikipedia.org/wiki/Metrication

    Imperial: Metric Indeterminate Liberia [Note 6] United States customary units [124] Metric and Imperial. The Liberian government has begun transitioning from use of imperial units to the metric system. However, this change has been gradual, with government reports concurrently using both systems. [131] 2011 [Note 7] [132] 2013 [133] [134] Myanmar

  7. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    Countries using the metric (SI), imperial, and US customary systems as of 2019. The International System of Units, or SI, [1]: 123 is a decimal and metric system of units established in 1960 and periodically updated since then.

  8. United States customary units - Wikipedia

    en.wikipedia.org/wiki/United_States_customary_units

    The imperial system, which is still used for some measures in the United Kingdom and other countries, is based on avoirdupois, with variations from U.S. customary units larger than a pound. The pound avoirdupois, which forms the basis of the U.S. customary system of mass, is defined as exactly 453.59237 grams by agreement between the U.S., the ...

  9. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    The basic unit of length in the imperial and U.S. customary systems is the yard, defined as exactly 0.9144 m by international treaty in 1959. [2] [5] Common imperial units and U.S. customary units of length include: [6] thou or mil (1 ⁄ 1000 of an inch) inch (25.4 mm) foot (12 inches, 0.3048 m) yard (3 feet, 0.9144 m)