What is the metric measurement of time called? And what are the divisions?
by 
George Dufferin
ANSWERS: 3
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seconds! (and gigaseconds, milliseconds, decaseconds...)
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Hours , Minutes, Seconds we just tend to use the 24 hour clock more. Although in the UK we do not use a lot of metric measurements but time is the same all over the world since it comes from GMT either plus or minus http://www.indwes.edu/Faculty/bcupp/things/metrictm.htm Numerous proposals have been made for alternative base units of metric time. An obvious unit is the day, with multiple and submultiple units such as decidays, centidays, and millidays. Base units equivalent to decimal divisions of the day, such as 1/10, 1/100, 1/1000, or 1/100,000 day, or other divisions of the day, such as 1/20 or 1/40 day, have also been proposed, with names such as tick, meck, chi, chron, moment, etc., and multiple and submultiple units formed with metric prefixes. Such alternative units have not gained any notable acceptance, however, mostly from sheer lack of acquaintance and familiarity.
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The base unit for time in the metric system is simply the second (s), hours and minutes are not SI (Système International d'Unités). As with any other metric unit it can take on any of the SI prefixes. You'll often hear of milliseconds (ms) in sports timing. Other units such as centisecond (cs) or kilosecond (ks) are permitted under the current system, but they are uncommon. Interestingly, because hour is not an SI unit kilometres per hour (km/h) is not the SI unit of speed. The SI unit of speed is metres per second (m/s), which is equal to 3.6 km/h.
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