In physics, the Planck charge is the unit of electric charge, denoted by q_P, in the system of natural units known as Planck units. It is defined as Physics (from the Greek, (phúsis), nature and (phusiké), knowledge of nature) is the science concerned with the discovery and understanding of the fundamental laws which govern matter, energy, space and time. ... Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interactions. ... In physics, Planck units are physical units of measurement originally proposed by Max Planck. ... In physics, Planck units are physical units of measurement defined exclusively in terms of the five universal physical constants shown in the table below in such a manner that all of these physical constants take on the numerical value of one when expressed in terms of these units. ...

where :

is the speed of light in the vacuum,

is the reduced Planck's constant or Dirac's constant,

is the Planck mass,

is the Planck length.

Its value as expressed in SI units is The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning swiftness. It is the speed of all electromagnetic radiation in a vacuum, not just visible light. ... Look up Vacuum in Wiktionary, the free dictionary. ... Plancks constant, denoted h, is a physical constant that is used to describe the sizes of quanta. ... The Planck mass is the natural unit of mass, denoted by mP. It is the mass for which the Schwarzschild radius is equal to the Compton length divided by π. ≈ 1. ... The Planck length, denoted by , is the unit of length in the system of units known as Planck units. ... Cover of brochure The International System of Units. ...

= 3.517672507 × 10 ⁻⁴³ C.