Wednesday, May 15, 2013

Standard measurement table

Introduction:
In the metric system of measurement, designations of multiples and sub-divisions of any unit may be deduced by combining with the name of the unit the prefixes like deka to, and kilo meaning, respectively, 10, 100, and 1000, and deci, centi, and milli, meaning, respectively, one-tenth, one-hundredth, and one-thousandth.

In scientific usage, it becomes convenient to measure multiples larger than 1000 and subdivisions smaller than one-thousandth. Therefore, the following prefixes have been introduced and these are recognized worlwide:

yotta,   (Y),      meaning 1024            deci,    (d),        meaning 10-1
zetta,   (Z),       meaning 1021            centi,   (c),        meaning 10-2
exa,     (E),       meaning 1018            milli,    (m),       meaning 10-3
peta,   (P),       meaning 1015            micro, (u),         meaning 10-6
tera,    (T),       meaning 1012            nano,   (n),        meaning 10-9
giga,   (G),       meaning 109             pico,    (p),         meaning 10-12
mega, (M),      meaning 106             femto, (f),          meaning 10-15
kilo,     (k),      meaning 103             atto,     (a),        meaning 10-18
hecto,  (h),       meaning 102             zepto,  (z),        meaning 10-21
deka,  (da),      meaning 101             yocto,  (y),        meaning 10-24

Units of Length

10 millimeters (mm)  = 1 centimeter (cm)
10 centimeters          = 1 decimeter (dm) = 100 millimeters
10 decimeters           = 1 meter (m)
10 meters                  = 1 dekameter (dam)
10 dekameters          = 1 hectometer (hm)
10 hectometers         = 1 kilometer (km)

Units of Liquid Volume

10 milliliters (mL)       = 1 centiliter (cL)
10 centiliters              = 1 deciliter (dL)
10 deciliters               = 1 liter
10 liters                     = 1 dekaliter (daL)
10 dekaliters             = 1 hectoliter (hL)
10 hectoliters             = 1 kiloliter (kL)

Units of Area

100 square millimeters (mm2)         = 1 square centimeter (cm2)
100 square centimeters                  = 1 square decimeter (dm2)
100 square decimeters                   = 1 square meter (m2)
100 square meters                          = 1 square dekameter (dam2) = 1 are
100 square dekameters                  = 1 square hectometer (hm2) = 1 hectare (ha)
100 square hectometers                 = 1 square kilometer (km2)

Units of Mass

10 milligrams (mg)    = 1 centigram (cg)
10 centigrams           = 1 decigram (dg) = 100 milligrams
10 decigrams            = 1 gram (g)
10 grams                   = 1 dekagram (dag)
10 dekagrams           = 1 hectogram (hg)
10 hectograms          = 1 kilogram (kg)
1000 kilograms         = 1 megagram (Mg) or 1 metric ton(t)

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