Appendix F: Unit Symbols

Following are the Base Units specified and used by the standard.
Base Units are administered by POSC.
Table 1: Base Units
Unit Symbol Unit Name
A ampere
K Kelvin
cd candela
dAPI API gravity
dB decibel
gAPI API gamma ray
kg kilogram
m meter
mol mole
nAPI API neutron
rad radian
s second
sr steradian

F.2 - Derived Units

Following are Derived Units specified and used by the standard.
Derived Units are administered by POSC.
Table 2: Derived Units
Unit Symbol Unit Expression Offset Unit Name
Btu 1055.05585262 J - British thermal unit (international)
C A.s - coulomb
D 0.9869233 um2 - darcy
GPa 1E9 Pa - gigapascal
Gal cm/s2 - Gal
Hz 1/s - hertz
J N.m - joule
L dm3 - liter
MHz 1E6 Hz - megahertz
MPa 1E6 Pa - megapascal
MeV 1E6 eV - megaelectronvolt
Mg 1000 kg - thousand kilograms
Mpsi 1E6 psi - million pounds per square inch
N kg.m/s2 - Newton
Oe 79.57747 A/m - oersted
P 0.1 Pa.s - poise
Pa N/m2 - pascal
S A/V - siemens
T Wb/m2 - tesla
V W/A - volt
W J/s - watt
Wb V.s - weber
a 3.155815E7 s - annum (sidereal year)
acre 627264E5/15499969 m2 - acre
atm 101.325 kPa - standard atmosphere
b 1E-28 m2 - barn
bar 100 kPa - bar
bbl 0.158987304 m3 - barrel
c 360 deg - revolution (cycle)
cP 0.01 P - centipoise
cal 4.1868 J - calorie (international)
cm 0.01 m - centimeter
cu 0.1 1/m - capture unit
d 24 h - day
daN 10 N - decanewton
deg 0.0174532925198 rad - degree (angle)
degC K -273.15 degree celsius
degF 5/9 degC +32 degree fahrenheit
dm 0.1 m - decimeter
eV 1.60219E-19 J - electron volt
fC 1E-15 C - femtocoulomb
ft 12 in - foot
g 0.001 kg - gram
gal 1/42 bbl - gallon
h 60 min - hour
in 0.0254 m - inch
kHz 1000 Hz - kilohertz
kPa 1000 Pa - kilopascal
kV 1000 V - kilovolt
keV 1000 eV - kiloelectronvolt
kgf 9.806650 N - kilogram force
km 1000 m - kilometer
lbf 4.4482216152605 N - pound force
lbm 0.45359237 kg - pound mass (avoirdupois)
mA 0.001 A - milliampere
mC 0.001 C - millicoulomb
mD 0.9869233E-3 um2 - millidarcy
mGal 0.001 Gal - milligal
mL 0.001 L - milliliter
mS 0.001 S - millisiemens
mT 0.001 T - millitesla
mV 0.001 V - millivolt
mW 0.001 W - milliwatt
mg 0.001 g - milligram
min 60 s - minute
mm 0.001 m - millimeter
mohm 0.001 ohm - milliohm
ms 0.001 s - millisecond
nC 1E-9 C - nanocoulomb
nW 1E-9 W - nanowatt
ns 1E-9 s - nanosecond
ohm V/A - ohm
pC 1E-12 C - picocoulomb
pPa 1E-12 Pa - picopascal
ppdk 1E-4 - part per ten thousand
ppk 0.001 - part per thousand
ppm 1E-6 - part per million
psi lbf/in2 - pound per square inch
pu 0.01 m3/m3 - porosity unit
t 1000 kg - metric ton
ton 2000 lbm - U.S. short ton
uA 1E-6 A - microampere
uC 1E-6 C - microcoulomb
uPa 1E-6 Pa - micropascal
uV 1E-6 V - microvolt
um 1E-6 m - micrometer
uohm 1E-6 ohm - microohm
upsi 1E-6 psi - micropound per square inch
us 1E-6 s - microsecond