Weights and Measures (Metric System)

WEIGHTS AND MEASUREMENTS, METRIC SYSTEM

The metric system is the one used in most civilized countries. Its fundamental units are: for lengths the meter; for weights the gram; and for capacities the liter. The square meter is used to measure the surfaces, and the cubic meter to measure the volumes.

The derived units are multiples or sub multiples of the fundamental ones. Each one is worth ten of the immediately inferior ones. The multiples are formed, prefixing the name of the fundamental unit, the Greek voices: deca, which means 10; hecto, 100; kilo, 1000; myria, 10,000; putting the Latin voices first: deci, which means tenth; centi, hundredth; and mili, thousandth. Today the micro particle is also used, which means millionth.

LENGTH STOCKINGS

The meter is equivalent to 1,650,763.73 wavelengths of the red-orange ray emitted in a vacuum by a crypton-86 gas atom. At first, the meter was intended to be a ten-millionth part of the quadrant of the terrestrial meridian, but this definition was abandoned because of the difficulty of making such a measurement with absolute precision. Then the international prototype meter was kept (until 1960) in a platinum bar and kept at a temperature of 0 ° C.

1 myriameter (Mm.) 10.000 meters
1 kilometer (Km.) 1.000
1 hectometer (hm.) 100
1 decameter (Dm.) 10
1 meter (m.) 1
1 decimeter (dm.) 0,1
1 centimeter (cm.) 0,01
1 millimeter (mm.) 0,001
1 micron (or micromillimeter) 0,000.001 0,000.1 mm.
1 millimicra (or millimicron) 0,000.000.001 0,001 micra
1 angstrom (A.) 0,000.000.1 mm. | 0,000.1 micra | 0,1 milimicra

 

SURFACE MEASURES
1 square diameter (Mm2) 100.000.000 m2
1 square kilometer (km2) 1.000.000 m2
1 hectare (Ha.) or square hectoliter (hm2) 10.000 m2
1 area (a.) or square decameter (Dm2) 100 m2
1 square meter (m2) 1 m2
1 square decimeter (dm2) 0,01 m2
1 square centimeter (cm2) 0,000.1 m2
1 square millimeter (mm2) 0,000.001 m2

 

VOLUME MEASURES
1 cubic kilometer (km3) 1.000.000.000 m3
1 cubic hectoliter (hm3) 1.000.000 m3
1 cubic decimeter (Dm3) 1.000 m3
1 cubic meter (m3) or stereo 1 m3
1 cubic decimeter (dm3) 0,000.1 m3
1 cubic centimeter (cm3) 0,000.001 m3
1 cubic millimeter (mm3) 0,000.000.001 m3

 

WEIGHT MEASUREMENTS

The gram is one thousandth of the international prototype kilogram. Platinum and iridium cylinder that is kept in the international office of weights and measures, in France. The gram is almost exactly equal to the weight of a cubic centimeter of pure water at 4 ° C of temperature, at sea level.

1 metric ton (T) 1.000 kg.
1 quintal metric (q) 100 kg.
1 milligram (Mg) 10 kg.
1 kilogram (kg) 1 kg. 1.000 g.
1 hectogram (hg) 100 g.
1 decagram (Dg) 10 g.
1 gram (g) 1g.
1 decigram (dg) 0,1 g.
1 centigram (cg) 0,01 g.
1 milligram (mg) 0,001 g.
1 metric kilate 200 mg. 0,2 g.

 

CAPACITY MEASURES
1 kiloliter (kl) 1.000 liters 1 m3
1 hectoliter (hl) 100 liters
1 decalitro (Dl) 10 liters
1 liter (l) 1 liter 1 dm3
1 deciliter (dl) 0,1
1 centiliter (cl) 0,01
1 milliliter (ml) 0,001