pixelConstants and Conversion Units
Units: to = <<Convert >>
constant value   unit conversion factor
amu (Atomic Mass Unit) 1.66054*10-27kg   1 Debye 3.336*10-30 Coul m
NA (Avogadro's Number) 6.0221367*1023 mol-1   1 eV 1.60217733*10-19 J
mB (Bohr magneton) 9.274015*10-24 J T-1   1 Hartree 4.3597482*10-18 J
ao (Bohr radius) 5.29177249*10-11 m   1 Hartree 627.509 kcal mol-1
kB (Boltzmann's constant) 1.380658*10-23 J K-1   1 Hartree 27.2116 eV
D (Debye) 3.33564*10-30 C m   1 kcal mol-1 4.184 J mol-1
e (Electron Charge) 1.60217733*10-19 Coul   1 Electron volt 23.06035 kcal mol-1
me (Electron Mass) 9.1093897*10-31 kg   1 Bohr 0.529177249 Angstroms
F (Faraday Constant) 96485 C mol-1   ZPVE (Hartree) 2.27817*10-6 * vib. cm-1
R (Gas Constant) 8.31451 J K-1 mol-1   vibrational temp. Tv (K) 1.43877 * vib. cm-1
e (Electron Charge) 1.60217733*10-19 Coul   N kg m s-2
g (Gravity Acceleration) 9.80665 m s-2   Pa N m-2
Eh (Hartree Energy) 4.3597482*10-18 J   J N m = kg m2 s-2
c (Light Speed) 2.99792458*1010 cm s-1   W J/s = kg m s-3
mn (Neutron Mass) 1.67493*10-27kg   V W/A = kg m s-3 A-1
h (Planck's constant) 6.6260755*10-34 J s   A C s-1
mp (Proton Mass) 1.672623*10-27kg   F C V-1
e0 (Vacuum Permittivity) 8.8541878*10-12 C2 J-1m-1   W V A-1 = kg m s-3 A-2
  T Wb m-2 = kg s-2 A-1
 
1 unit =
erg J cal
eV
hartrees
cm-1
Hz K kJ mol-1 kcal mol-1
erg
1
1x10-7 2.398x10-8 6.241x10+11 2.294x10+10 5.034x10+15 1.5092x10+26 7.243x10+15 6.022x10+13 1.4393x10+13
J 1x10+7 
1
2.390x10-1 6.241x10+18 2.294x10+17 5.034x10+22 1.5092x10+33 7.243x10+22 6.022x10+20 1.4393x10+20
cal 4.1840x10+7
4.1840
1
2.611x10+19 9.597x10+17 2.106x10+23 6.315x10+33 3.031x10+23 2.520x10+21 6.022x10+20
eV
1.6022x10-12 1.6022x10-19 3.829x10-20
1
3.675x10-2 8.065x10+3 2.418x10+14 1.1605x10+4 9.648x10+1 2.306x10+1
hartrees 4.360x10-11 4.360x10-18 1.0420x10-18 2.721x10+1
1
2.195x10+5 6.580x10+15 3.158x10+5 2.626x10+3 6.275x10+2
cm-1
1.9865x10-16 1.9865x10-23 4.748x10-24 1.2399x10-4 4.556x10-6 1 2.998x10+10 1.4388 1.1963x10-2 2.859x10-3
Hz 6.626x10-27 6.626x10-34 1.5837x10-34 4.136x10-15 1.5198x10-16 3.336x10-11 1 4.799x10-11 3.990x10-13 9.537x10-14
K 1.3807x10-16 1.3807x10-23 3.300x10-24 8.617x10-5 3.167x10-6 6.950x10-1 2.084x10+10 1 8.314x10-3 1.9871x10-3
kJ mol-1
1.6606x10-14 1.6606x10-21 3.969x10-22 1.0364x10-2 3.809x10-4 8.359x10+1 2.506x10+12 1.2027x10+2 1 2.390x10-1
kcal mol-1
6.948x10-14 6.948x10-21 1.6606x10-21 4.337x10-2 1.5936x10-3 3.498x10+2 1.0486x10+13 5.032x10+2 4.184 1