Note that this reference documentation is identical to the help that is displayed in MATLAB when you type “help ft_scalingfactor”.

  FT_SCALINGFACTOR determines the scaling factor from old to new units, i.e. it
  returns a number with which the data in the old units needs to be multiplied
  to get it expressed in the new units. 
 
  Use as
    factor = ft_scalingfactor(old, new)
  where old and new are strings that specify the units.
 
  For example
    ft_scalingfactor('m', 'cm')          % returns 100
    ft_scalingfactor('V', 'uV')          % returns 1000
    ft_scalingfactor('T/cm', 'fT/m')     % returns 10^15 divided by 10^-2, which is 10^17
    ft_scalingfactor('cm^2', 'mm^2')     % returns 100
    ft_scalingfactor('1/ms', 'Hz')       % returns 1000
 
  The following fundamental units are supported
    metre       m   length  l (a lowercase L), x, r L
    kilogram    kg  mass    m   M
    second      s   time    t   T
    ampere      A   electric current    I (an uppercase i)  I
    kelvin      K   thermodynamic temperature   T   #
    mole        mol amount of substance n   N
    candela     cd  luminous intensity  Iv (an uppercase i with lowercase non-italicized v subscript)   J
 
  The following derived units are supported
    hertz       Hz  frequency   1/s T-1
    radian      rad angle   m/m dimensionless
    steradian   sr  solid angle m2/m2   dimensionless
    newton      N   force, weight   kg#m/s2 M#L#T-2
    pascal      Pa  pressure, stress    N/m2    M#L-1#T-2
    joule       J   energy, work, heat  N#m = C#V = W#s M#L2#T-2
    coulomb     C   electric charge or quantity of electricity  s#A T#I
    volt        V   voltage, electrical potential difference, electromotive force   W/A = J/C   M#L2#T-3#I-1
    farad       F   electric capacitance    C/V M-1#L-2#T4#I2
    siemens     S   electrical conductance  1/# = A/V   M-1#L-2#T3#I2
    weber       Wb  magnetic flux   J/A M#L2#T-2#I-1
    tesla       T   magnetic field strength V#s/m2 = Wb/m2 = N/(A#m)    M#T-2#I-1
    henry       H   inductance  V#s/A = Wb/A    M#L2#T-2#I-2
    lumen       lm  luminous flux   cd#sr   J
    lux         lx  illuminance lm/m2   L-2#J
    becquerel   Bq  radioactivity (decays per unit time)    1/s T-1
    gray        Gy  absorbed dose (of ionizing radiation)   J/kg    L2#T-2
    sievert     Sv  equivalent dose (of ionizing radiation) J/kg    L2#T-2
    katal       kat catalytic activity  mol/s   T-1#N
 
  The following alternative units are supported
    inch        inch  length
    feet        feet  length
    gauss       gauss magnetic field strength
 
  The following derived units are not supported due to potential confusion
  between their ascii character representation
    ohm             #   electric resistance, impedance, reactance   V/A M#L2#T-3#I-2
    watt            W   power, radiant flux J/s = V#A   M#L2#T-3
    degree Celsius	?C	temperature relative to 273.15 K	K	?
 
  See also http://en.wikipedia.org/wiki/International_System_of_Units