Enter the elementary charge and the extra number of electrons into the calculator to determine the net charge.

Net Charge Formula

The following formula is used to calculate a net charge.

Q = n * e

  • Where Q is the net charge (C)
  • n is the number of extra electrons gained or lost
  • e is the charge of one electron (1.6*10^-19 C)

Net Charge Definition

What is a net charge? A net charge is the total charge of an atom that has gained or lost electrons causing it to have either a positive or negative charge.

Example Problem

How to calculate net charge?

  1. First, determine the charge of one electron.

    An electron charge is known to be approximately 1.6*10^-19 (C) where C is the units of Coulombs.

  2. Next, determine the number of electrons gained or lost.

    For this problem, the atom has gained 2 electrons.

  3. Finally, calculate the net charge.

    Using the formula above, the net charge is found to be 1.6*10^-19 * 2 = 3.2*10^-19.