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Metric SI units PDF Print E-mail
Written by Garfield Lucas   

The International System of Units is abbreviated "SI" from the French "le Système international d'unités". SI is the modern form of the metric system and is a coherent and definable measurement system devised around multiples of ten. It is the planet's most widely used system of measurement, both for everyday commerce and for engineering, science and technology.


Base SI units

Length metre m

Mass kilogram kg

Time second s

Electric current ampere A C/s
Absolute temperature kelvin K

Amount of substance mole mol

Luminous intensity candela cd

Coherent derived SI units

Plane angle radian rad

Solid angle steradian sr

Frequency hertz Hz 1/s
Force newton N kg m/s²
Energy joule J Nm
Power watt W J/s VA
Electric Charge coulomb C As
Voltage - potential difference volt V W/A
Electrical capacitance farad F C/V
Electrical resistance ohm W V/A
Magnetic flux weber Wb

Magnetic flux density tesla T

Inductance henry H

Luminous Flux lumen lm

Illumination lux lx lm/m²

Further reading

Last Updated on Saturday, 25 July 2009 14:40
 

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