Coulomb’s Law Calculator

This Coulomb’s law calculator helps you calculate the attraction or repulsion between two static charged particles.

If the charges are equal, enter the Charge (q₁ & q₂), and distance (r) to calculate the electric force.

Enter charge 1 (q₁), charge 2 (q₂), and distance (r) to calculate the electric force if the charges are not equal.

Coulomb’s law states that attraction or repulsion between charged bodies is directly proportional to their product and inversely proportional to distance squared, acting along point charges.

You might be interested in Charles law or Boyles law.

Coulombs law formula and calculator


  • Jonson, J. O. (1997). The magnetic force between two currents explained using only Coulomb’s law. Chinese Journal of Physics, 35(2), 139-149.
  • Jonson, J. O. (2008). Turning Back to Coulomb’s Law as a Basis for Electromagnetism. Proceedings of the NPA, 5(1), 113-118.
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