SI Units

SI Base and Derived units with Prefixes

0
11350
Basic SI Units, derived si units and Prefixes. Decimal multiples or fractions of SI units, The SI system has seven base units from which all other units are derived. engineering mindset https://www.theengineeringmindset.com

The SI units of measurement are based on seven quantities, other commonly used quantities are derived from these.

SI Base units:

Base QuantityBase UnitBase Symbol
LengthMeterm
TimeSeconds
MassKilogramkg
TemperatureKelvinK
Electric currentAmpereA
Luminous intensityCandelacd
Amount of substanceMoleMol

SI derived units:

Derived quantityDerived unitDerived symbol
Areasquare meter[m2]
Volumecubic meter[m3]
accelerationmeter per second squared[m/s2]
Speed, velocitymeter per second[m/s]
wave numberreciprocal meter[m-1]
mass densitykilogram per cubic meter[kg/m3]
specific volumecubic meter per kilogramv [kg/m3]
current densityampere per square meter[A/m2]
magnetic field strengthampere per meter[A/m]
amount of substance concentrationmol per cubic meter[mol/m3]
luminancecaldela per square meter[cd/m2]
mass fractionkilogram per kilogram[kg/kg]
FrequencyHertzf [Hz]
ForceNewtonN
Energy, WorkJouleJ
Electric chargeCoulombC
PowerWattW [J/s]
Potential differencevoltV or U
CapacitanceFaradF
Electrical resistanceOhmΩ
Magnetic fluxWeberWb [V.s]
Magnetic flux densityTeslaT [Wb/m2]
InductanceHenryH
PressurePascalPa [N/m2]
Radionuclide activityBecquerelBq
Dynamic viscosityPascal secondµ [Pa·s]
Moment of forceNewton meter[N·m]
Surface tensionNewton per meter[N/m]
Angular velocityRadian per second[rad/s]
Angular accelerationRadian per second squared[rad/s2]
Heat flux density, irradianceWatt per square meter[W/m2]
EntropyJoule per kelvinS [J/K]
Specific heat capacity, specific entropyJoule per kilogram kelvincp [J/(kg·K)]
Specific energyJoule per kilogramJ/kg
Thermal conductivityWatt per meter kelvinK [W/(m·K)]
Energy densityJoule per cubic meter[J/m3]
Electric field strengthVolt per meter[V/m]
Electric charge densityCoulomb per cubic meter[C/m3]
Electric flux densityCoulomb per square meter[C/m2]
Molar energyJoule per mole[J/mol]
Molar entropyJoule per mole Kelvin[J/(mol·K)]
Absorbed dose rateGray per second[Gy/s]
Radiant intensityWatt per steradian[W/sr]
RadianceWatt per square meter Steradian[W/(m2·sr)]
catalytic concentrationkatal per cubic meter[kat/m3]

SI Unit prefixes

NameMultiplierPrefixPower of 10
Tera1,000,000,000,000T1 x 1012
Giga1,000,000,000G1 x 109
Mega1,000,000M1 x 106
Kilo1,000k1 x 103
Unit1
Milli0.001m1 x 10-3
Micro0.000,001µ1 x 10-6
Value-1Value-2η1 x 10-9
Value-1Value-2ρ1 x 10-12

SI Base units: Table as image for offline viewing

SI BASE UNITS TABLE
SI BASE UNITS TABLE

SI Unit prefixes: Table as image for offline viewing

SI Unit prefixes TABLE
SI Unit prefixes TABLE

SI derived units:Table as image for offline viewing

SI derived units TABLE
SI derived units TABLE

LEAVE A REPLY

Please enter your comment!
Please enter your name here