Can a Charge to Planck Mass Ratio Be Validly Calculated?

[Meselwulf]

Is there anything wrong in saying there can be a charge to Planck Mass ratio?

I calculate it as

$$\frac{e}{M_p} \propto 1.861 721 726 984 943 \times 10^{-10} C/kg$$

But I find no references by any science that they have done this?

 

[Meselwulf]

Apparently no one has calculated it before for a Planck Mass, but it is a perfectly valid move. I was doing this for my investigation into Planck Particles (micro black holes) which exist for roughly a Planck Time.

Thanks anyway.