Planck units

Function to convert back and forth between SI and Planck units. The constants \(c, \hbar, \epsilon_0, k_B\) are equal to 1.

unitconvert.planck.factorPlanck(q)

Find the conversion factor that is used to convert the given quantity q to and from Planck units and SI units

Args :

q (astropy quantity) : the quantity for which unit conversion must be done

Returns :

(dictionary) : the conversion factor in terms of \(c, \hbar, \epsilon_0, k_B,G\)

Example :

>>> from unitconvert.planck import factorPlanck
>>> from astropy import units as u
>>> factorPlanck(1*u.m)
{'c': -1.5, 'hbar': 0.5, 'k_B': 0, 'eps0': 0.0, 'G': 0.5}

unitconvert.planck.fromPlanck(q, finalUnits)

Convert the given astropy quantity q in Planck units to SI units

Args :

q (astropy quantity) : the quantity which needs to be converted

finalUnits (astropy quantity) : the base units to which quantity needs to be converted back.

All fundamental quantities are unit less in Planck units. Therefore we need to specify the SI unit to which we need to convert it back to.

Returns :

(astropy quantity) : the input quantity q in SI units

Example :

>>> from unitconvert.planck import fromPlanck
>>> from astropy import units as u
>>> fromPlanck(6.18714241e+34,u.m)
<Quantity 1. m>

unitconvert.planck.toPlanck(q)

Convert the given astropy quantity q in SI units to Planck units

Args :

q (astropy quantity) : the quantity which needs to be converted

Returns :

(astropy quantity) : the input quantity q in Planck units

Example :

>>> from unitconvert.planck import toPlanck
>>> from astropy import units as u
>>> toPlanck(1*u.m)
<Quantity 6.18714241e+34>