Planck charge: a natural unit of electric charge

planckCharge is the charge unit derived from fundamental constants in Planck units. It combines the reduced Planck constant, the speed of light, and the vacuum electric constant, providing a scale for theoretical physics rather than a laboratory charge standard.

Use and interpretation

It is useful when nondimensionalizing equations in quantum gravity or natural-unit calculations. Compare elementaryCharge, the charge carried by a proton in magnitude, and planckLength, another Planck-scale unit.

Caveats

This is not a common SI working unit. Keep units explicit when mixing it with coulombs, and use multiply and divide only after establishing a consistent unit convention.