NOTE The units ppb and ppt are deprecated because the names "billion" and "trillion" are ambiguous. |
||||
Symbol (c/s) |
Display Name |
Print Symbol |
Kind of Quantity |
Metric |
10* |
the number ten for arbitrary powers |
10n |
|
no |
10^ |
the number ten for arbitrary powers |
10n |
|
no |
[pi] |
the number pi |
π |
|
no |
% |
percent |
% |
|
no |
[ppth] |
parts per thousand |
ppth |
|
no |
[ppm] |
parts per million |
ppm |
|
no |
[ppb] |
parts per billion |
ppb |
|
no |
[pptr] |
parts per trillion |
pptr |
|
no |
SI units NOTE Defined by CGPM (General Conference on Weights and Measures). |
||||
Symbol (c/s) |
Display Name |
Print Symbol |
Kind of Quantity |
Metric |
mol |
mole |
mol |
amount of substance |
yes |
sr |
steradian |
sr |
solid angle |
yes |
Hz |
hertz |
Hz |
frequency |
yes |
N |
newton |
N |
force |
yes |
Pa |
pascal |
Pa |
pressure |
yes |
J |
joule |
J |
energy |
yes |
W |
watt |
W |
power |
yes |
A |
ampère |
A |
electric current |
yes |
V |
volt |
V |
electric potential |
yes |
F |
farad |
F |
electric capacitance |
yes |
Ohm |
ohm |
Ω |
electric resistance |
yes |
S |
siemens |
S |
electric conductance |
yes |
Wb |
weber |
Wb |
magnetic flux |
yes |
Cel |
degree Celsius |
°C |
temperature |
yes |
T |
tesla |
T |
magnetic flux density |
yes |
H |
henry |
H |
inductance |
yes |
lm |
lumen |
lm |
luminous flux |
yes |
lx |
lux |
lx |
illuminance |
yes |
Bq |
becquerel |
Bq |
radioactivity |
yes |
Gy |
gray |
Gy |
energy dose |
yes |
Sv |
sievert |
Sv |
dose equivalent |
yes |
Other units from ISO 1000, ISO 2955, and some from ANSI X3.50. |
||||
Symbol (c/s) |
Display Name |
Print Symbol |
Kind of Quantity |
Metric |
gon |
gon, grade |
□g |
plane angle |
no |
deg |
degree |
° |
plane angle |
no |
' |
minute |
' |
plane angle |
no |
'' |
second |
'' |
plane angle |
no |
l |
liter |
l |
volume |
yes |
L |
liter |
L |
volume |
yes |
ar |
are |
a |
area |
yes |
min |
minute |
min |
time |
no |
h |
hour |
h |
time |
no |
d |
day |
d |
time |
no |
a_t |
tropical year |
at |
time |
no |
a_j |
mean Julian year |
aj |
time |
no |
a_g |
mean Gregorian year |
ag |
time |
no |
a |
year |
a |
time |
no |
wk |
week |
wk |
time |
no |
mo_s |
synodal month |
mos |
time |
no |
mo_j |
mean Julian month |
moj |
time |
no |
mo_g |
mean Gregorian month |
mog |
time |
no |
mo |
month |
mo |
time |
no |
t |
tonne |
t |
mass |
yes |
bar |
bar |
bar |
pressure |
yes |
u |
unified atomic mass unit |
u |
mass |
yes |
eV |
electronvolt |
eV |
energy |
yes |
AU |
astronomic unit |
AU |
length |
no |
pc |
parsec |
pc |
length |
yes |
CGS units NOTE The units of the older Centimeter-Gram-Second (CGS) system. |
||||
Symbol (c/s) |
Display Name |
Print Symbol |
Kind of Quantity |
Metric |
Ky |
Kayser |
K |
lineic number |
yes |
Gal |
Gal |
Gal |
acceleration |
yes |
dyn |
dyne |
dyn |
force |
yes |
erg |
erg |
erg |
energy |
yes |
P |
Poise |
P |
dynamic viscosity |
yes |
Bi |
Biot |
Bi |
electric current |
yes |
St |
Stokes |
St |
kinematic viscosity |
yes |
Mx |
Maxwell |
Mx |
flux of magnetic induction |
yes |
G |
Gauss |
Gs, G |
magnetic flux density |
yes |
Oe |
Oersted |
Oe |
magnetic field intensity |
yes |
Gb |
Gilbert |
Gb |
magnetic tension |
yes |
sb |
stilb |
sb |
lum. intensity density |
yes |
Lmb |
Lambert |
L |
brightness |
yes |
ph |
phot |
ph |
illuminance |
yes |
Ci |
Curie |
Ci |
radioactivity |
yes |
R |
Roentgen |
R |
ion dose |
yes |
RAD |
radiation absorbed dose |
RAD |
energy dose |
yes |
REM |
radiation equivalent man |
REM |
dose equivalent |
yes |