SI Units

SI Base and Derived units with Prefixes

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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 http://www.theengineeringmindset.com

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

SI Base units:

[table width =”100%” style =”table-striped table-bordered table-hover” responsive =”true”] [table_head] [th_column]Base Quantity[/th_column] [th_column]Base Unit[/th_column] [th_column]Base Symbol[/th_column] [/table_head] [table_body] [table_row] [row_column]Length[/row_column] [row_column]Meter[/row_column] [row_column]m[/row_column] [/table_row] [table_row] [row_column]Time[/row_column] [row_column]Second[/row_column] [row_column]s[/row_column] [/table_row] [table_row] [row_column]Mass[/row_column] [row_column]Kilogram[/row_column] [row_column]kg[/row_column] [/table_row] [table_row] [row_column]Temperature[/row_column] [row_column]Kelvin[/row_column] [row_column]K[/row_column] [/table_row] [table_row] [row_column]Electric current[/row_column] [row_column]Ampere[/row_column] [row_column]A[/row_column] [/table_row] [table_row] [row_column]Luminous intensity[/row_column] [row_column]Candela[/row_column] [row_column]cd[/row_column] [/table_row] [table_row] [row_column]Amount of substance[/row_column] [row_column]Mole[/row_column] [row_column]Mol[/row_column] [/table_row] [/table_body] [/table]

SI derived units:

[table width =”100%” style =” table-hover” responsive =”true”] [table_head] [th_column]Derived quantity[/th_column] [th_column]Derived unit[/th_column] [th_column]Derived symbol[/th_column] [/table_head] [table_body] [table_row] [row_column]Area[/row_column] [row_column]square meter[/row_column] [row_column][m2][/row_column] [/table_row] [table_row] [row_column]Volume[/row_column] [row_column]cubic meter[/row_column] [row_column][m3][/row_column] [/table_row] [table_row] [row_column]acceleration[/row_column] [row_column]meter per second squared[/row_column] [row_column][m/s2][/row_column] [/table_row] [table_row] [row_column]Speed, velocity[/row_column] [row_column]meter per second[/row_column] [row_column][m/s][/row_column] [/table_row] [table_row] [row_column]wave number[/row_column] [row_column]reciprocal meter[/row_column] [row_column][m-1][/row_column] [/table_row] [table_row] [row_column]mass density[/row_column] [row_column]kilogram per cubic meter[/row_column] [row_column][kg/m3][/row_column] [/table_row] [table_row] [row_column]specific volume[/row_column] [row_column]cubic meter per kilogram[/row_column] [row_column]v [kg/m3][/row_column] [/table_row] [table_row] [row_column]current density[/row_column] [row_column]ampere per square meter[/row_column] [row_column][A/m2][/row_column] [/table_row] [table_row] [row_column]magnetic field strength[/row_column] [row_column]ampere per meter[/row_column] [row_column][A/m][/row_column] [/table_row] [table_row] [row_column]amount of substance concentration[/row_column] [row_column]mol per cubic meter[/row_column] [row_column][mol/m3][/row_column] [/table_row] [table_row] [row_column]luminance[/row_column] [row_column]caldela per square meter[/row_column] [row_column][cd/m2][/row_column] [/table_row] [table_row] [row_column]mass fraction[/row_column] [row_column]kilogram per kilogram[/row_column] [row_column][kg/kg][/row_column] [/table_row] [table_row] [row_column]Frequency[/row_column] [row_column]Hertz[/row_column] [row_column]f [Hz][/row_column] [/table_row] [table_row] [row_column]Force[/row_column] [row_column]Newton[/row_column] [row_column]N[/row_column] [/table_row] [table_row] [row_column]Energy, Work[/row_column] [row_column]Joule[/row_column] [row_column]J[/row_column] [/table_row] [table_row] [row_column]Electric charge[/row_column] [row_column]Coulomb[/row_column] [row_column]C[/row_column] [/table_row] [table_row] [row_column]Power[/row_column] [row_column]Watt[/row_column] [row_column]W [J/s][/row_column] [/table_row] [table_row] [row_column]Potential difference[/row_column] [row_column]volt[/row_column] [row_column]V or U[/row_column] [/table_row] [table_row] [row_column]Capacitance[/row_column] [row_column]Farad[/row_column] [row_column]F[/row_column] [/table_row] [table_row] [row_column]Electrical resistance[/row_column] [row_column]Ohm[/row_column] [row_column]Ω [/row_column] [/table_row] [table_row] [row_column]Magnetic flux[/row_column] [row_column]Weber[/row_column] [row_column]Wb [V.s][/row_column] [/table_row] [table_row] [row_column]Magnetic flux density[/row_column] [row_column]Tesla[/row_column] [row_column]T [Wb/m2][/row_column] [/table_row] [table_row] [row_column]Inductance[/row_column] [row_column]Henry[/row_column] [row_column]H[/row_column] [/table_row] [table_row] [row_column]Pressure[/row_column] [row_column]Pascal[/row_column] [row_column]Pa [N/m2][/row_column] [/table_row] [table_row] [row_column]Radionuclide activity[/row_column] [row_column]Becquerel[/row_column] [row_column]Bq[/row_column] [/table_row] [table_row] [row_column]Dynamic viscosity[/row_column] [row_column]Pascal second[/row_column] [row_column]µ [Pa·s][/row_column] [/table_row] [table_row] [row_column]Moment of force[/row_column] [row_column]Newton meter[/row_column] [row_column][N·m][/row_column] [/table_row] [table_row] [row_column]Surface tension[/row_column] [row_column]Newton per meter[/row_column] [row_column][N/m][/row_column] [/table_row] [table_row] [row_column]Angular velocity[/row_column] [row_column]Radian per second[/row_column] [row_column][rad/s][/row_column] [/table_row] [table_row] [row_column]Angular acceleration[/row_column] [row_column]Radian per second squared[/row_column] [row_column][rad/s2][/row_column] [/table_row] [table_row] [row_column]Heat flux density, irradiance[/row_column] [row_column]Watt per square meter[/row_column] [row_column][W/m2][/row_column] [/table_row] [table_row] [row_column]Entropy[/row_column] [row_column]Joule per kelvin[/row_column] [row_column]S [J/K] [/row_column] [/table_row] [table_row] [row_column]Specific heat capacity, specific entropy[/row_column] [row_column]Joule per kilogram kelvin[/row_column] [row_column]cp [J/(kg·K)][/row_column] [/table_row] [table_row] [row_column]Specific energy[/row_column] [row_column]Joule per kilogram[/row_column] [row_column]J/kg[/row_column] [/table_row] [table_row] [row_column]Thermal conductivity[/row_column] [row_column]Watt per meter kelvin[/row_column] [row_column]K [W/(m·K)][/row_column] [/table_row] [table_row] [row_column]Energy density[/row_column] [row_column]Joule per cubic meter[/row_column] [row_column][J/m3][/row_column] [/table_row] [table_row] [row_column]Electric field strength[/row_column] [row_column]Volt per meter[/row_column] [row_column][V/m][/row_column] [/table_row] [table_row] [row_column]Electric charge density[/row_column] [row_column]Coulomb per cubic meter[/row_column] [row_column][C/m3][/row_column] [/table_row] [table_row] [row_column]Electric flux density[/row_column] [row_column]Coulomb per square meter[/row_column] [row_column][C/m2][/row_column] [/table_row] [table_row] [row_column]Molar energy[/row_column] [row_column]Joule per mole[/row_column] [row_column][J/mol][/row_column] [/table_row] [table_row] [row_column]Molar entropy[/row_column] [row_column]Joule per mole Kelvin[/row_column] [row_column][J/(mol·K)][/row_column] [/table_row] [table_row] [row_column]Absorbed dose rate[/row_column] [row_column]Gray per second[/row_column] [row_column][Gy/s][/row_column] [/table_row] [table_row] [row_column]Radiant intensity[/row_column] [row_column]Watt per steradian[/row_column] [row_column][W/sr][/row_column] [/table_row] [table_row] [row_column]Radiance[/row_column] [row_column]Watt per square meter Steradian[/row_column] [row_column][W/(m2·sr)][/row_column] [/table_row] [table_row] [row_column]catalytic concentration[/row_column] [row_column]katal per cubic meter[/row_column] [row_column][kat/m3][/row_column] [/table_row] [/table_body] [/table]

SI Unit prefixes

[table width =”100%” style =” table-hover” responsive =”true”] [table_head] [th_column]Name[/th_column] [th_column]Multiplier[/th_column] [th_column]Prefix[/th_column] [th_column]Power of 10[/th_column] [/table_head] [table_body] [table_row] [row_column]Tera[/row_column] [row_column]1,000,000,000,000[/row_column] [row_column]T[/row_column] [row_column]1 x 1012[/row_column] [/table_row] [table_row] [row_column]Giga[/row_column] [row_column]1,000,000,000[/row_column] [row_column]G[/row_column] [row_column]1 x 109[/row_column] [/table_row] [table_row] [row_column]Mega[/row_column] [row_column]1,000,000[/row_column] [row_column]M[/row_column] [row_column]1 x 106[/row_column] [/table_row] [table_row] [row_column]Kilo[/row_column] [row_column]1,000[/row_column] [row_column]k[/row_column] [row_column]1 x 103[/row_column] [/table_row] [table_row] [row_column]Unit[/row_column] [row_column]1[/row_column] [row_column] [/row_column] [row_column] [/row_column] [/table_row] [table_row] [row_column]Milli[/row_column] [row_column]0.001[/row_column] [row_column]m[/row_column] [row_column]1 x 10-3[/row_column] [/table_row] [table_row] [row_column]Micro[/row_column] [row_column]0.000,001[/row_column] [row_column]µ[/row_column] [row_column]1 x 10-6[/row_column] [/table_row] [table_row] [row_column]Value-1[/row_column] [row_column]Value-2[/row_column] [row_column]η[/row_column] [row_column]1 x 10-9[/row_column] [/table_row] [table_row] [row_column]Value-1[/row_column] [row_column]Value-2[/row_column] [row_column]ρ[/row_column] [row_column]1 x 10-12[/row_column] [/table_row] [/table_body] [/table]

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