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  2. History of the metric system - Wikipedia

    en.wikipedia.org/wiki/History_of_the_metric_system

    A fleeting hint of an ancient decimal or metric system may be found in the Mohenjo-Daro ruler, which uses a base length of 1.32 inches (33.5 mm) and is very precisely divided with decimal markings. Bricks from that period are consistent with this unit, but this usage appears not to have survived, as later systems in India are non-metric ...

  3. Metrication - Wikipedia

    en.wikipedia.org/wiki/Metrication

    Over time, the metric system has influenced the United States through international trade and standardisation. The use of the metric system was made legal as a system of measurement in 1866 [165] and the United States was a founding member of the International Bureau of Weights and Measures in 1875. [166]

  4. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    The International System of Units, internationally known by the abbreviation SI (from French Système international d'unités), is the modern form of the metric system and the world's most widely used system of measurement. It is the only system of measurement with official status in nearly every country in the world, employed in science ...

  5. Coherence (units of measurement) - Wikipedia

    en.wikipedia.org/wiki/Coherence_(units_of...

    The concept of coherence was only introduced into the metric system in the third quarter of the nineteenth century; in its original form the metric system was non-coherent – in particular the litre was 0.001 m 3 and the are (from which we get the hectare) was 100 m 2. A precursor to the concept of coherence was however present in that the ...

  6. System of units of measurement - Wikipedia

    en.wikipedia.org/wiki/System_of_units_of_measurement

    Mesures usuelles (French for customary measures) were a system of measurement introduced as a compromise between the metric system and traditional measurements. It was used in France from 1812 to 1839. A number of variations on the metric system have been in use.

  7. 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.

  8. Metrology - Wikipedia

    en.wikipedia.org/wiki/Metrology

    This led to the creation of the decimal-based metric system in 1795, establishing a set of standards for other types of measurements. Several other countries adopted the metric system between 1795 and 1875; to ensure conformity between the countries, the Bureau International des Poids et Mesures (BIPM) was established by the Metre Convention.

  9. Metric system - Wikipedia

    en.wikipedia.org/wiki/Metric_system

    The metric system is a system of measurement that standardizes a set of base ... and the mass of a mole of table salt is 58.4 g. ... A number of different metric ...