  Units list, based on https://doi.org/10.6028/NIST.SP.330-2019
  7 SI base dimensions: time, length, mass, electric current, thermodynamic temperature, amount of substance, luminous intensity
  Length
m = 1 m
  Time
s = 1 s
hr = 3600 s
hour = 1 hr
min = 60 s
minute = 1 min
day = 24 hr
dy = 1 day
d = 1 day
yr = 365.25 day  Julian year
year = 1 yr
  Mass
kg = 1 kg
  Electric current
A = 1 A
  Thermodynamic temperature
K = 1 K
  Amount of substance
mol = 1 mol
  Luminous intensity
cd = 1 cd
  Multiples
km = 1e3 m
dm = 1e-1 m
cm = 1e-2 m
mm = 1e-3 m
um = 1e-6 m
nm = 1e-9 m
pm = 1e-12 m
fm = 1e-15 m
ms = 1e-3 s
us = 1e-6 s
ns = 1e-9 s
ps = 1e-12 s
g = 1e-3 kg
mg = 1e-6 kg
ug = 1e-9 kg
pA=1e-12 A
nA=1e-9 A
uA=1e-6 A
mA=1e-3 A
kA=1e3 A
MA=1e6 A
GA=1e9 A
TA=1e12 A
nK=1e-9 K
uK=1e-6 K
mK=1e-3 K
kK=1e3 K
MK=1e6 K
GK=1e9 K
pmol=1e-12 mol
nmol=1e-9 mol
umol=1e-6 mol
mmol=1e-3 mol
kmol=1e3 mol
Mmol=1e6 mol
ucd=1e-6 cd
mcd=1e-3 cd
kcd=1e3 cd
Mcd=1e6 cd


  Special name units
Hz = 1 s^-1
N = 1 kg*m*s^-2
Pa = 1 kg*m^-1*s^-2
J = 1 kg*m^2*s^-2
W = 1 kg*m^2*s^-3
C = 1 A*s
V = 1 kg*m^2*s^-3*A^-1
F = 1 kg^-1*m^-2*s^4*A
ohm = 1 kg*m^2*s^-3*A^-2
S = 1 kg^-1*m^-2*s^3*A^2
Wb = 1 kg*m^2*s^-2*A^-1
T = 1 kg*s^-2*A^-1
H = 1 kg*m^2*s^-2*A^-2
kat = 1 mol*s^-1
  Multiples
mHz=1e-3 Hz
kHz=1e3 Hz
MHz=1e6 Hz
GHz=1e9 Hz
mN=1e-3 N
kN=1e3 N
MN=1e6 N
GN=1e9 N
kPa=1e3 Pa
MPa=1e6 Pa
GPa=1e9 Pa
pJ=1e-12 J
nJ=1e-9 J
uJ=1e-6 J
mJ=1e-3 J
kJ=1e3 J
MJ=1e6 J
GJ=1e9 J
pW=1e-12 W
nW=1e-9 W
uW=1e-6 W
mW=1e-3 W
kW=1e3 W
MW=1e6 W
GW=1e9 W
pC=1e-12 C
nC=1e-9 C
uC=1e-6 C
mC=1e-3 C
nV=1e-9 V
uV=1e-6 V
mV=1e-3 V
kV=1e3 V
MV=1e6 V
fF=1e-15 F
pF=1e-12 F
nF=1e-9 F
uF=1e-6 F
mF=1e-3 F
mohm=1e-3 ohm
kohm=1e3 ohm
Mohm=1e6 ohm
Gohm=1e9 ohm
nWb=1e-9 Wb
uWb=1e-6 Wb
mWb=1e-3 Wb
pT=1e-12 T
nT=1e-9 T
uT=1e-6 T
mT=1e-3 T
pH=1e-12 H
nH=1e-9 H
uH=1e-6 H
mH=1e-3 H

  Derived units and non-SI
  Area
ha = 10000 m^2
  Volume
L = 1e-3 m^3
mL = 1e-6 m^3
uL = 1e-7 m^3
cc = 1 cm^3
  Speed
mph = 1 mi/hr
kph = 1 km/hr
  Mass
t = 1e3 kg  metric ton
Da = 1.660539040e-27 kg
  Energy
eV = 1.602176634e-19 J  exact
keV = 1000 eV
MeV = 1e6 eV
GeV = 1e9 eV
TeV = 1e12 eV
  Length
au = 149597870700 m
ly = 1 c*yr
pc = 206265 au
  Magnetic
G=1e-4 T
mG=1e-3 G
kG=1e3 G
  
  Computer binary units
b = 1 b  byte
bit = 0.125 b
Kib = 1024 b
Mib = 1048576 b
Gib = 1073741824 b
Tib = 1099511627776 b

  Force and acceleration
f = 9.80665 N/kg   Mass to force multiplier in Earth gravity, multiply by mass such as kg*f or lb*f
dwater = 1 g/cm^3  water head (pressure) as cm*f*dwater
dmercury = 13.6 g/cm^3  mercury head (pressure) as mm*f*dmercury
whead = 1 f*dwater
mhead = 1 f*dmercury
kgf = 1 kg*f
lbf = 1 lb*f
Gal = 1 cm/s^2

  CGS
dyn = 1e-5 N
erg = 1e-7 J
Ba = 0.1 Pa
P = 0.1 Pa*s
St = 1e-4 m^2/s

  Imperial units
gal = 3.785412 L  US gallon
qt = 0.25 gal   US quart
pt = 0.125 gal  US pint
lb = 0.453592 kg
ft = 0.3048 m
in = 0.0254 m
thou = 0.001 in
mil = 0.001 in
mi = 5280 ft
yd = 3 ft
acre = 43560 ft^2
hp = 745.7 W

  Cooking units
tsp = 4.928922 cc  US teaspoon
tbsp = 14.78676 cc US tablespoon
floz = 29.57353 cc US fluid ounce
cup = 236.5882 cc  US cup
  Thermochemical
cal = 4.184 J
kcal = 4184 J
BTU = 1055.06 J
Wh = 3600 J
kWh = 3.6e6 J
MWh = 3.6e9 J

  Pressure units from https://www.nist.gov/pml/sensor-science/thermodynamic-metrology/unit-conversions
mbar = 100 Pa
bar = 1000 mbar
Torr = 133.3224 Pa
mTorr = 1e-3 Torr
uTorr = 1e-6 Torr
psi = 6894.757 Pa
ksi = 1000 psi
atm = 101325 Pa

  Gas Flow
sccm = 0.001 slm
slm = 16.722408 atm*cc/s

  Constants
c=299792458 m/s  speed of light  exact
h=6.62607015e-34 kg*m^2/s  Planck constant  exact
hbar=1.054571817e-34 kg*m^2/s  Planck/(2*pi)
e=1.602176634e-19 C  elementary charge  exact
eo=8.8511878188e-12 F/m  vacuum permittivity
uo=1.25663706127e-6 N/A^2  vacuum permeability
Co=273.15 K  zero point of degrees Celsius
Na=6.02214076e23  mol^-1  Avogadro number  exact
kB=1.380649e-23 J/K Boltzmann constant  exact
me=9.1093837e-31 kg  electron mass
mp=1.672621924e-27 kg  proton mass
