Excess Electrons Calculator

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The net electric charge on the object in coulombs. Negative values mean excess electrons; positive means a deficit (fewer electrons than protons).
C
Unit for the charge input or output. The calculator converts internally to SI (coulombs).
Excess electrons
+10

Number of excess (or deficit) electrons corresponding to the given charge.

Net charge Q1.602176634e-18 C
Net charge (coulombs)1.602176634e-18 C
Net charge (nC)1.6022e-9 nC
Magnitude10

Deficit electrons: +10.

  • The object has a deficit of +10 electrons, giving it a net positive charge.
  • The elementary charge is exactly 1.602176634 x 10^-19 C (defined since the 2019 SI redefinition), so the total charge is 10 x e.
  • Electric charge is quantised: every charge in nature is an integer multiple of e. This was confirmed by Millikan's oil-drop experiment in 1909.

Next stepTo find the electrostatic force between two such charged objects, use Coulomb's law: F = k * Q1 * Q2 / r^2, where k = 8.988 x 10^9 N m^2 C^-2.

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