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| SI Derived Units With Special Names |
| Quantity |
Name |
Symbol |
Expression in
terms of other SI
units |
Expression in
terms of SI
base units |
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| Plane angle |
radian |
rad |
|
1 |
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| Solid angle |
steradian |
sr |
|
1 |
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| Frequency |
hertz |
Hz |
|
s−1 |
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| Force |
newton |
N |
|
kg m s−2 |
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| Pressure, Stress |
pascal |
Pa |
N/m2 |
kg m−1 s−2 |
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| Energy, Work, Quantity of Heat |
joule |
J |
N m |
kg m2 s−2 |
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| Power, Radiant Flux |
watt |
W |
J/s |
kg m2 s−3 |
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| Electric Charge, Quantity of Electricity |
coulomb |
C |
|
s A |
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| Electric Potential, Potential Difference, Electromotive Force |
volt |
V |
W/A |
kg m2 s−3 A−1 |
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| Capacitance |
farad |
F |
C/V |
kg−1 m−2 s4 A2 |
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| Electric Resistance |
ohm |
Ω |
V/A |
kg m2 s−2 A−1 |
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| Electric Conductance |
siemens |
S |
A/V |
kg−1 m−2 s3 A2 |
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| Magnetic Flux |
weber |
Wb |
V s |
kg m2 s−2 A−1 |
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| Magnetic Flux Density |
tesla |
T |
Wb/m2 |
kg s−2 A−1 |
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| Inductance |
henry |
H |
Wb/A |
kg m2 s−2A−2 |
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| Celsius Temperature |
degree celsius |
°C |
|
K |
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| Luminous Flux |
lumen |
lm |
|
cd sr |
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| Illuminance |
lux |
lx |
lm/m2 |
m−2 cd sr |
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| Activity of a Radionuclide |
bequerel |
Bq |
|
s−1 |
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| Absorbed Dose, Specific Energy Imparted, Kerma, Absorbed Dose Index |
gray |
Gy |
J/kg |
m2 s−2 |
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| Dose Equivalent, Dose Equivalent Index |
sievert |
Sv |
J/kg |
m2 s−2 |
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| equivalent, personal dose equivalent, organ equivalent dose |
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| SI Derived Units Expressed by Means of Special Names |
| Quantity |
Name |
Symbol |
Expression in terms of SI base units |
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| Dynamic Viscosity |
pascal second |
Pa s |
kg m−1 s−1 |
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| Moment of Force |
newton metre |
N m |
kg m2 s−2 |
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| Surface Tension |
newton per metre |
N/m |
s−2 |
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| Heat Flux Density / Irradiance |
watt per square metre |
W/m2 |
s−3 |
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| Heat Capacity / Entropy |
joule per kelvin |
J/K |
kg m 2 s−2 K−1 |
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| Specific Heat Capacity / Specific Entropy |
joule per kilogram kelvin |
J/(kg K) |
m2 s−2 K−1 |
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| Specific Energy |
joule per kilogram |
J/kg |
m 2 s−2 |
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| Thermal Conductivity |
watt per metre kelvin |
W/(m K) |
kg m s−3 K−1 |
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| Energy Density |
joule per cubic metre |
J/m3 |
kg m−1 s−2 |
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| Electric Field Strength |
volt per metre |
V/m |
kg m s−3 A−1 |
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| Electric Charge Density |
coulomb per cubic metre |
C/m3 |
m−3 s A |
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| Electric Flux Density |
coulomb per square metre |
C/m2 |
m−2 s A |
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| Permittivity |
farad per metre |
F/m |
kg−1 m−3 s4 A2 |
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| Permeability |
henry per metre |
H/m |
kg m s−2 A−2 |
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| Molar Energy |
joule per mole |
J/mol |
kg m2 s−2 mol−1 |
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| Molar Entropy / Molar Heat Capacity |
joule per mole kelvin |
J/(mol K) |
kg m2 s−2 K−1 mol−1 |
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| Exposure (x and γ rays) |
coulomb per kilogram |
C/kg |
kg−1 s A |
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| Absorbed Dose Rate |
gray per second |
Gy/s |
m2 s−3 |
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| Radiant intensity |
watt per steradian |
W sr−1 |
m2 kg s−3 |
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| Radiance |
watt per square metre steradian |
W m−2 sr−1 |
kg s−3 |
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| SI Supplementary Units |
| Quantity |
Name |
Symbol |
Expression in terms of SI base units |
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| Plane Angle |
radian |
rad |
m m−1 = 1 |
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| Solid Angle |
steradian |
sr |
m2 m−2 = 1 |
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| SI Derived Units Formed Using Supplementary Units |
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