Named units derived from SI base units
| Name |
Symbol |
Quantity |
Expression in terms of other units |
Expression in terms of SI base units |
| hertz |
Hz |
frequency |
1/s |
s−1 |
| newton |
N |
force, weight |
m∙kg/s2 |
m∙kg∙s−2 |
| pascal |
Pa |
pressure, stress |
N/m2 |
m−1∙kg∙s−2 |
| joule |
J |
energy, work, heat |
N∙m = C·V = W·s |
m2∙kg∙s−2 |
| watt |
W |
power, radiant flux |
J/s |
m2∙kg∙s−3 |
| coulomb |
C |
electric charge or electric flux |
s∙A |
s∙A |
| volt |
V |
voltage, electrical potential difference, electromotive force |
W/A = J/C |
m2∙kg∙s−3∙A−1 |
| farad |
F |
electric capacitance |
C/V |
m−2∙kg−1∙s4∙A2 |
| ohm |
Ω |
electric resistance, impedance, reactance |
V/A |
m2∙kg∙s−3∙A−2 |
| siemens |
S |
electrical conductance |
1/Ω |
m−2∙kg−1∙s3∙A2 |
| weber |
Wb |
magnetic flux |
J/A |
m2∙kg∙s−2∙A−1 |
| tesla |
T |
magnetic field |
V∙s/m2 = Wb/m2 = N/A∙m |
kg∙s−2∙A−1 |
| henry |
H |
inductance |
V∙s/A = Wb/A |
m2∙kg∙s−2∙A−2 |
| Celsius |
°C |
Celsius Temperature |
t°C = tK − 273.15 |
K |
| lumen |
lm |
luminous flux |
cd∙sr |
cd |
| lux |
lx |
illuminance |
lm/m2 |
m−2∙cd |
| becquerel |
Bq |
radioactivity (decays per unit time) |
1/s |
s−1 |
| gray |
Gy |
absorbed dose (of ionizing radiation) |
J/kg |
m2∙s−2 |
| sievert |
Sv |
equivalent dose (of ionizing radiation) |
J/kg |
m2∙s−2 |
| katal |
kat |
catalytic activity |
mol/s |
s−1∙mol |
