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  2. SI base unit - Wikipedia

    en.wikipedia.org/wiki/SI_base_unit

    The Celsius scale: the Kelvin scale uses the degree Celsius for its unit increment, but is a thermodynamic scale (0 K is absolute zero). Θ mole: mol amount of substance "The mole, symbol mol, is the SI unit of amount of substance. One mole contains exactly 6.022 140 76 × 10 23 elementary entities.

  3. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    Nonetheless, the residual and irreducible instability of a physical IPK undermined the reliability of the entire metric system to precision measurement from small (atomic) to large (astrophysical) scales. [39] By avoiding the use of an artefact to define units, all issues with the loss, damage, and change of the artefact are avoided. [1]: 125

  4. System of units of measurement - Wikipedia

    en.wikipedia.org/wiki/System_of_units_of_measurement

    The stone is not a measurement of weight used in the US. The US customary system uses the short hundredweight of 100 lb and short ton of 2,000 lb. Where these systems most notably differ is in their units of volume. A US fluid ounce (fl oz), about 29.6 millilitres (ml), is slightly

  5. International unit - Wikipedia

    en.wikipedia.org/wiki/International_unit

    Multivitamins nutrition facts label showing that the international unit of, for example, vitamins D and E correspond to different gram values. In pharmacology, the international unit (IU) is a unit of measurement for the effect or biological activity of a substance, for the purpose of easier comparison across similar forms of substances.

  6. Metric system - Wikipedia

    en.wikipedia.org/wiki/Metric_system

    This differs from many older systems in which the ratio of different units varied. For example, 12 inches is one foot , but the larger unit in the same system, the mile is not a power of 12 feet. It is 5,280 feet – which is hard to remember for many.

  7. Cooking weights and measures - Wikipedia

    en.wikipedia.org/wiki/Cooking_weights_and_measures

    ‡ In Canada, a cup was historically 8 imperial fluid ounces (227 mL) but could also refer to 10 imperial fl oz (284 mL), as in Britain, and even a metric cup of 250 mL. Serving sizes on nutrition labelling on food packages in Canada employ the metric cup of 250 mL, with nutrition labelling in the US using a cup of 240 mL, based on the US ...

  8. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    Coordinates were measured in grades on official French terrestrial ordnance charts from the French revolution well into the 20th century. 1 grade (or in modern symbology, 1 gon) = 0.9° or 0.01 right angle. One advantage of this measure is that the distance between latitude lines 0.01 gon apart at the equator is almost exactly 1 kilometre.

  9. Alcohol measurements - Wikipedia

    en.wikipedia.org/wiki/Alcohol_measurements

    28.4 mL: 30 mL: Traditional Scottish spirits measure Peg (India) 1 imp fl oz-28.4 mL: 30 mL: Also called a "small peg"; a "large peg" is a double measure of 2 imperial ounces (60 mL). Traditional spirits measure on the Indian subcontinent. 1 ⁄ 4 Gill (Irish) 1 + 1 ⁄ 4 imp fl oz: 35.5 mL: 35 mL: Traditional Irish spirits measure Pony (U.S ...